Two issues are dispositive on certiorari: (1) Did the trial court err when it entered judgment against the plaintiffs upon sustaining the three defendants’ demurrers to the evidence? (2) Is the appellate court’s decision granting nisi prius costs to the jury-exonerated defendant reviewable on certiora-ri now beforе us? We answer the first question in the affirmative and the second in the negative.
*1070 I
THE ANATOMY OF LITIGATION
Roxie T. Jones [Jones] was travelling westbound on Interstate 40 in the left-hand lane near Westminster Road in Oklahoma County. She was following an Oklahoma City [City] Police Officer [Officer], Traffic, which had just completed its passage through a construсtion stretch of the Interstate highway where it had been choked down to a single lane, had begun to diffuse into multiple lanes. The Officer activated his emergency lights (but not his audible siren) and turned into the center median to pursue an eastbound speeder. Interpreting his action as an order for her to stop, Jones pulled over onto the median about one quarter mile ahead of the Officer. She stopped with part of her station wagon extending backwards into the fast traffic lane. Shelby L. Perry [Perry], who was following Jones in his motor home, succeeded in stopping behind her vehicle. 1 An unidentified truck hauling a boat trailer (which was in line of traffic following Perry) maneuvered around the mobile home into the adjacent right-hand lane. Daniel Jackson [Jackson or motorist], whose vehicle was following immediately behind the truck/boat trailer, collided with the Perry mobile home, injuring both him and his passenger Cheri Denise Cox [Cox or passengеr]. Their light truck came to rest at an angle with the right side exposed to traffic. Abraham B. Hagens’ [Hagens] car struck the Jackson/Cox truck on the passenger side, resulting in a more extensive injury to its occupants. According to some testimony, the entire sequence of events transpired within a few seconds.
Jackson and Cox brought negligent tort actions 2 against the City, Jones, Perry and Hagens. Their claims against the City are rested upon its Officer’s violation of a statutory duty which, they allege, constitutes negligence •per se. 3 The case went to a jury. At the close of Jackson’s and Cox’s case the trial court sustained demurrers to the evidence interposed by the City, Jones and Perry. It ruled that (1) the Officer was not primarily negligent because the dоuble-impact collision was not a foreseeable result of his act of turning into the median, (2) Perry was not primarily culpable because his behavior was reasonable and, (3) regardless of the Officer’s and Jones’ negligence, Perry’s acts constituí ed a supervening cause which effectively insulated the others from liability. Jackson’s suit against Hаgens (the only remaining defendant in the case) proceeded to verdict without Cox’s participation. Her claim against Hagens had been settled. 4 Jackson was adjudged 80% negligent and Hagens 20%. In a post-trial proceeding Hagens sought to recover his nisi prius court costs, which the trial court denied. Jackson and Cox, whose new trial quests were also refused, appealed for review of (1) the judgment on demurrers’ sustention and of (2) the new trial denial. 5 Hctyens appealed for cor- *1071 recüve relief from denial of Ms nisi prius costs. 6 The Court of Appeals affirmed the Msi prius judgment on demurrers but reversed the decision on costs. The latter were ordered taxed against Jackson. Jackson and Cox were granted certiorari review of that portion of the appellate court opirnon wMch affirmed the trial court’s judgment on demurrers and its demal of new trial; Jackson did not seek relief from the Court of Appeals’ costs award to Hagens.
II
DEFENDANTS’ DEMURRERS
A
THE STANDARD OF REVIEW FOR THE NISI PRIUS JUDGMENT ON DEMURRER TO THE EVIDENCE
When a trial court considers a demurrer to the evidence 7 it must take as true all evidence (together with all reasonable inferences) favorable to the party against whom reliеf is sought and disregard any conflicting evidence that may favor the de-murrant. 8 A demurrer should be overruled unless there is an entire absence of proof tending to show a right to recover. 9 In short, the demurrer must be denied if the opponent has made out a prima facie case. 10 A reviewing court will examine the record in light most favorable to the plaintiff (disregarding conflicts or contrary inferences) but will disturb the Msi prius sustention of a demurrer only if there is competent evidence to support the material elements of the plaintiffs cаuse of action. 11
B
EITHER DISPUTED FACTS OR CONFLICTING INFERENCES DEDUC-IDLE FROM UNDISPUTED FACTS WILL COMPEL SUBMISSION OF THE OFFICER’S AND PERRY’S DIRECT NEGLIGENCE AS A JURY ISSUE
Three evidentiary elements essential to a prima facie case of negligence are: *1072 (1) a duty owed by the defendant to protect the plaintiff from injury, (2) a failure properly to exercise or perform that duty and (3) the plaintiffs injuries proximately caused by the defendant’s breach. 12 If facts relevant to the question of 'primary negligence are in dispute, the issue must be submitted to the jury. 13 Whenever uncontroverted proof lends support to conflicting inferences, the choice to be made between opposite alternatives also presents an issue of fact for the trier. 14
1. The Officer’s Negligence
It is uncontroverted that the Officer entered the median without operating his audible siren. Neither is it disputed that traffic behind him was fanning out into the unblocked beginning of the right lane. One potential inference from this evidence is that, under the circumstances, the Officer may have created a foreseeable risk of harm. Although this inference is permissibly drawn from undisputed facts, the Officer’s primary negligence nonetheless presents a question for the trier. 15
2. Perry’s Negligence
Whether Perry had sufficient opportunity to negotiate around the protruding' Jones vehicle is in controversy. On this record it is impossible for us to say as a matter of law that Perry’s stopping was consistent with due care because his conduct was free frоm a reasonably foreseeable risk of harm.
C
NEITHER THE CONDUCT OF PERRY NOR THAT OF JACKSON (OR BOTH COMBINED) MAY, AS A MATTER OF LAW, BE CHARACTERIZED AS A SUPERVENING CAUSE 16
Jackson and Cox urge reversible error in the trial court’s ruling that sustained the three defendants’ demurrers to their evidence. That decision was grounded in the notion that as a matter of law Perry’s actions constitute a supervening event. Negligence is not actionable unless it proximately causes the harm for which liability is sought to be imposed. 17 In a negligent tort case the question of proximate cause 18 is generally one of *1073 fact for the jury. 19 It becomes one of law only when there is no evidence from which a jury could reasonably find a causal nexus between the act and the injury. 20 The presence of competent evidence to show this causal connection — i.e., whether there is any competent evidence that would support a jury finding of causation — is in turn a law question for the court. 21
The general rule is that the causal chain between a negligent act and an injury may be broken by an intervening evеnt — a supervening cause. 22 Not every intervening event severs the causal link between negligent act and injury. 23 For example, when a cause merely combines with another act to produce injury, 24 or several events coincide to bring about a single injurious result, 25 each negligent actor may be held accountable.. For an occurrence to rise to the magnitude of a supervening cause it must possess three attributes: (1) independence from the original negligent act, (2) adequacy of itself to bring about the complained-injury and (3) reasonable unforseea-b ility. 26 The question of an intervening event’s foreseeability calls for an evaluative determination 27 by the trier of fact. Whether the injurious consequences that resulted from the original negligence could have been reasonably foreseen is an issue traditionally within the realm of fact, not law. 28 If the intervening force is of a character which (under the circumstances) would induce belief that it might be reasonably expected to occur, the final element is not met and the causal chain will remain unbroken. 29
1. Defendant Perry’s Negligence
Disputed, relevant facts call for the jury’s evaluative determination on this issue. 30 Whether Perry had sufficient room to remain in the left lane and still avoid Jones is in controversy. This means that whether Jones could reasonably anticipate Perry’s stopping at the time and place in suit is a pure fact question. 31
*1074 2. Plaintiff Jackson’s Negligence
The dismissed defendants contend on appeal that the trial court’s judgment on demurrers is nonetheless correct because Jackson’s alleged negligence — when scrutinzed — rises to the level of a supervening cause. A successful party who did not appeal, counter- or cross-appeal may assign in an appellate court only those errors which, if rectified, would support the correctness of the trial court’s judgment. 32 These dismissed defendants clearly stand here in a posture restricted to the defense of the relief granted them below 33 — that of judgment upon their evidentiary demurrers. Although these defendants urge that the nisi prius judgment is correct, and ask us to ascribe a supervening character to Jackson’s acts, there is no record support to sustain their contention as a matter of law. It is undisputed that the truck/boat trailer avoided Perry by changing lanes and that traffic in the right-hand lane was too heavy for Jackson to negotiate a similar lane change. Two opposite inferences may be drawn from these facts: Either (1) Jаckson could have (like the truck/boat trailer ahead) successfully dodged Perry or (2) the swift and heavy right-lane traffic prevented him from passing Perry and thus avoiding the impact. From the vantage point of Jones, reasonable anticipation of Jackson’s collision with the Perry mobile home (which may or may not have been able to circumnavigate the Jones vehicle) is a question uрon which reasonable minds might differ. Hence, fhe foreseeability of Jackson’s acts — negligent or not — must be left for an evaluative decision of the jury. 34
III
THIS COURT CANNOT REACH FOR CERTIORARI REVIEW THAT PORTION OF THE COURT OF APPEALS’ OPINION WHICH REVERSED THE TRIAL COURT’S DENIAL OF NISI PRIUS COSTS TO HAGENS
Extant jurisprudence 35 teaches that issues resolved by the Court of Appeals but not explicitly pressed for certiorari review are beyond this court’s cognizance. 36 Hagens, while unsuccessful in his costs quest at nisi prius, prevailed on this issue in the appellate court. At that juncture of appellate contest it became incumbent upon Jackson to challenge the correctness of the appellate court’s reversal that allowеd costs to Hagens. A timely quest for our corrective relief from the costs’ award (to Hagens) is absent from Jackson’s certiorari paperwork. That portion of the Court of Appeals opinion must hence stand undisturbed as settled law of this case. 37
IV
SUMMARY
The trial court erred when it entered judgment for the City, Jonеs and Perry upon these defendants’ evidentiary challenge by their demurrers. The Officer’s, Jones’ and *1075 Perry’s primary negligence presents a question of fact for the jury.
Undisputed record facts which support conflicting inferences make the Officer’s negligence a question for the jury. Disputed facts as to whether Perry had sufficient room to pass the Jones vehicle clearly place his primary negligence, if any, within the fact finder’s realm. 38
The question whether the acts of Perry or Jackson rise to the level of supervening causes which insulate the Officer, Jones and/or Perry from tort liability remains one for an evaluative determination of the trier. This is so because the record reveals both disputed facts and undisputed facts from which conflicting inferences may be drawn. It is impossible to declare, as a matter of law, that on this record either Perry’s or Jacksоn’s actions and the natural results of their responses could not have been reasonably anticipated. The jury’s evaluation of the relevant facts to be tendered must gauge them by the law’s required rubric of “foreseeability”. 39
Because Jackson did not timely seek cer-tiorari for our scrutiny of the appellate court’s costs award against him, that determination, which lies beyond this court’s reviewing cognizance, is to be treated as settled law of the case.
ON CERTIORARI PREVIOUSLY GRANTED, THE COURT OF APPEALS’ OPINION IS VACATED; THE TRIAL COURT’S JUDGMENT ON DEMURRERS IS REVERSED AND THE COURT OF APPEALS’ LITIGATION COSTS’ AWARD HELD BEYOND THIS COURT’S REVIEWING COGNIZANCE ON CERTIO-RARI; THE CAUSE IS REMANDED FOR PROCEEDINGS NOT INCONSISTENT WITH TODAY’S PRONOUNCEMENT.
Notes
. Whether Jones had pulled into the median far enough to allow Perry to pass is a disputed fact question.
. Jackson brought a direct action against his insurance carrier, Mid-Century Insurance Company, for property damage covered by their insurance contract. This loss was settled. Jackson’s passenger, Cox, settled her claims against Jackson and Hagens. Jackson’s property damage claim against Hagens was not pressed in this action.
. The terms of 47 O.S.1991 § 11-106 provide in pertinent part:
"(a) The driver of an ... emergency vehicle ... when in the pursuit of an actual or suspected violator of the law ... may exercise the privilege set forth in this section, but subject to the conditions herein stated.
(b) The driver of an ... emergency vehicle may:
* * * * * *
4.Disregard regulations governing direction of movement or turning in specified directions. (c) The exemptions herein granted to an authorized emergency vehicle shall apply only when such vehicle is making use of audible and visual signals....” (Emphasis added.)
The terms of the Oklahoma City Municipal Code, § 32-244 prohibit U-tums except at a median crossing.
. See the text of note 2, supra.
. Jackson and Cox’s new trial motion sought vacation of the trial court's judgment upon the City’s, Jones’ and Perry's demurrers. It did not address itself to the Jackson/Hagens jury verdict. That claim's nisi prius resolution is beyond our reach and left undisturbed. The terms of 12 O.S.1991 § 991(b) provide:
"If a motion for a new trial be filed and a new trial be denied, the movant may not, on the *1071 аppeal, raise allegations of error that were available to him at the time of the filing of his motion for a new trial but were not therein asserted.” (Emphasis added.)
. By this court's October 21, 1991 order, Ha-gens’ appeal — Number 78,097 — was consolidated with that by Jackson and Cox for contemporaneous disрosition by a single opinion.
. The terms of 12 O.S.1991 § 577 provide in pertinent part:
"When the jury has been sworn, the trial shall proceed in the following order, unless the court for special reasons otherwise directs:
* * * * * *
Third. The party on whom rests the burden of the issues must first produce his evidence; after he has closed his evidence the adverse party may interрose and file a demurrer thereto, upon the ground that no cause of action or defense is proved. If the court shall sustain the demurrer, such judgment shall be rendered for the party demurring as the state of the pleadings or the proof shall demand....” (Emphasis added.)
.
Byford v. Town of Asher,
Okl.,
.
Blood, supra
note 8 at 145;
Martin v. Stratton,
Okl.,
. Courts use the concept of "prima facie case” in two different senses: (1) to describe that state of a case in which the party plaintiff rests after producing evidence in chief to support the material elements of its cause of action (i.e., as a quantum of evidence necessary for the claim's submission to a jury), and (2) tо address situations where the plaintiff's evidence as a whole is not countered because the defendant produces nothing to rebut it.
Husbands v. Com. of Pa.,
.
Middlebrook v. Imler, Tenny & Kugler, M.D.'s,
Okl.,
.
Thompson v. Presbyterian Hospital, Inc.,
Okl.,
.
Kansas City Southern Railway Co. v. Marrow,
Okl.,
.
Wetsel v. Independent School Dist. I-1,
Okl.,
. See Wetsel, supra note 14 at 991; Thomas, supra note 14 at 203.
. In Oklahoma’s jurisprudential nomenclature, "supervening” cаuse is synonymous with that which the Restatement (Second) Torts calls "superseding" cause — an intervening event which, in a negligent tort case, will sever the causal chain. The terms of Section 440, Restatement (Second) Torts are:
"A superseding cause is an act of a third person or other force which by its intervention prevents the actor from being liable for harm to another which his antecedent negligence is a substantial factor in bringing about.” (Emphasis added.)
See in this connection William J. McNichols, The Relevance of the Plaintiff's Misconduct in Strict Torts Products Liability, the Advent of Comparative Responsibility, and the Proposed Restatement (Third) of Torts 47 Okla.L.Rev. 201, 270 n. 307 (1994), where the term "intervening" cause seems to be the author's preference for the same concept.
. Thompson, supra note 12 at 263.
. Proximate cause is not necessarily the immediate, near or
nearest
cause. It is one that
acts as first
and immediate (1) to the injury or (2) to other causes set in motion by it. In the latter case an event may be said to proximately cause the injury if the causes it initiates are each started naturally by the one that precedes it by altogether constituting a complete chain or succession of events, which are so united to each other by a close causal connection
as to form a natural whole through reaching from the first, or producing cause, to the final result. Pfeifer v. Standard Gateway Theater,
.
Thompson, supra
note 12 at 263;
Smith v. Davis,
Okl.,
.
Thompson, supra
note 12 at 263;
Pepsi-Cola Bottling Co. of Tulsa, Okl. v. Von Brady,
Okl.,
. Thompson, supra note 12 at 263.
. See supra note 16 for an explanation of this term’s use.
.
Graham v. Keuchel,
Okl.,
.
Graham, supra
note 23 at 348;
Minor, supra
note 23 at 394;
Champlin Oil and Refining Co. v. Roever,
Okl.,
.
Graham, supra
note 23 at 348;
Minor, supra
note 23 at 394;
Green v. Sellers,
Okl.,
.
Graham, supra
note 23 at 348;
Thompson, supra
note 12 at 264;
Long v. Ponca City Hospital,
Okl.,
. "... The issue as tо whether a described consequence was ‘foreseeable,’ or was 'directly' caused, and the issue as to whether an intervening force was 'abnormal' are to be decided as issues of fact are decided.... [T]o decide, for example, whether a described consequence wаs 'foreseeable' one must apply to the determined physical facts a legal standard — the concept of 'foreseeability' as it is defined and explained in the legal precedents. The decision to he made is an evaluative determination■ — an evaluation of the facts as measuring up to or not measuring up to the legal standard which has been set by the precedents defining ‘foreseeability’ as used in this legal context.” (Emphasis added.) Prosser and Keeton on the Law of Torts, § 45 (5th ed. 1984).
.
Bradford Securities v. Plaza Bank and Trust,
Okl.,
.
Atherton v. Devine,
Okl.,
. Marrow, supra note 13 at 820; McBride, supra note 13 at 972-973.
. Authority cited by the defendants for the proposition that a negligently parked automobile
may never, as a matter of law,
be the primary cause of injury where another driver's negligence is injectеd into the causal chain is inapplicable.
Thur v. Dunkley,
Okl.,
.
Price v. Reed,
Okl.,
. May, supra note 32 at 540 n. 12; Woolfolk, supra note 32 at 745.
. For the same reasons Hagens’ actions cannot, as a matter of law, be said to rise to the stature of a supervening cause.
.
Hough v. Leonard,
Okl.,
. Hough, supra note 35 at 445; Ford, supra note 35 at 952 n. 1.
. The
settled-law-of-the-case doctrine
operates to bar relitigation of issues which are finally settled
by an appellate opinion
or those that the aggrieved party
has failed timely to raise in the course of appellate contest. Morrow Dev. v. American Bank and Trust,
Okl.,
. Jones cannot be shielded by the perceived supervening cause to be assigned either to Perry’s or to Jackson’s conduct.
. Were we called upon to assay
sua sponte
whether
issue preclusion
bars relitigation of Jackson's negligence vis-a-vis the dismissed defendants in the case, we would loоk to the prior proceeding's record, taking into account the pleadings, evidence, claims and other relevant material to conclude whether a rational jury could have grounded its verdict
upon an issue other
than that which a defendant seeks to foreclose from consideration.
Ashe v. Swenson,