On this appeal from a jury verdict that, among other things, awarded the plaintiff-appellant damages for retaliation under the Rental Housing Act of 1985 (the Act), the primary issues are whether the trial judge erred in directing a verdict against plaintiff on her claim for negligence and whether an independent cause of action for retaliation may be maintained under the Act. We answer both questions in the negative, and therefore affirm in part and reverse in part the judgment of the trial court.
I.
Plaintiff Mary Twyman has been the tenant of defendant Naomi Johnson since 1974, when the Twymаns moved into their apartment pursuant to an oral lease between Mr. Twyman and Mr. Johnson, both since deceased. When Mrs. Johnson took over management of the rental property in 1988, Mrs. Twyman pointed out to her several problems with the residence, including defects in the rear porch and steps leading to the ground from the porch. On November 1,1989, Mrs. Twyman was carrying trash down the rear steps to the back alley when she fell on the second or third step and sustained injuries to her left wrist and hand. In August 1991, she filed suit against Johnson in Superior Court for negligence resulting in that injury and for breаch of the implied warranty of habitability. 1 Meanwhile, in June 1991 the District of Columbia responded to a complaint by Twy-man and issued a Housing Deficiency Notice to Johnson regarding the conditions at the Twyman residence. At that time, Twyman began withholding rent.
In November and December of 1991, Johnson filed two consecutive complaints for possession in Superior Court based on Twy-man’s non-payment of rent, each indicating, incorrectly, that statutory notice had been waived in writing. As the complaints were also defective in the identity of the person verifying them, Johnson voluntarily dismissed bоth, and the trial court awarded sanctions against Johnson’s then-counsel, Kane, for attorney’s fees. Twyman then amended her civil complaint to add claims for abuse of process and retaliation, alleging that the possessory actions had been motivated by her recourse to legal action. After serving Twyman with the proper 30-day notice to vacate, Johnson filed a third landlord and tenant complaint based on non-payment of rent. Besides answering the complaint, Twyman counterclaimed both for a rent abatement dating back three yeаrs because of the housing code violations and for damages for retaliation. The landlord and tenant action was consolidated with the civil action for trial.
At trial, Twyman’s expert, Gregory Harrison, a consulting engineer, testified about the sub-standard conditions of the back steps, stating that they lacked dimensional uniformity of the risers and treads, were not slip resistant, and were not protected by a handrail, only a “guardrail.” According to Harrison, the step on which Twyman said she fell — the second or third depending on how the steps were counted — was unsafe and violated the housing code. Other than Twyman, however, no one had personally witnessed the fall and could testify how it had happened. 2 Twyman, for her part, was frank in testifying that she did not know what had caused her to fall. On direct examination she recalled the approximate step from which she had fallen (“the second or third step — I don’t know which one of the two”), but stated: “I was just going down the steps and I just fell — that’s all I remember.” On cross-examination she again stated, “I don’t know what caused me to fall,” and in response to *852 the question whether she had “any explanation as to why [shе] fell down the steps,” answered “No.” 3
At the end of Twyman’s case the trial judge directed a verdict for Johnson on the negligence count, concluding that Twyman, though she had fallen from steps conceded by Johnson to be defective, had presented no evidence to establish that the condition of the steps caused her fall. The breach of warranty, abuse of process, and retaliation claims were later submitted to the jury, which awarded Twyman damages (in the form of a rent abatement) for the warranty claim and separate damages of $10,000 for retaliation, while rejecting the claim of abuse of process.
II.
Twyman appeals from the directed verdict on negligence, and also attacks evidentiary rulings which she contends weakened her presentation of the abuse of process claim to the jury. Johnson in turn challenges the trial court’s ruling which allowed the retaliation claim to go to the jury both as a defense to the suit for possession and back rent and as an independent claim and counterclaim.
A.
We sustain the directed verdict on negligence. Although we view the evidence on appeal in the light most favorable to the party that prevailed in the trial court,
Jackson v. Condor Management Group, Inc.,
Twyman was required to present evidence sufficient to persuade a rеasonable jury by a preponderance of the evidence that “the breach of duty ha[d] a substantial and direct causal link to [her] injury.”
Freeman, supra
note 4,
Twyman also relies on
McCoy v. Quadrangle Dev. Corp.,
Twyman relies on the testimony in passing of her expert, Harrison, that a defective stair tread was “what caused the fall.” But, as the trial judge recognized shortly thereafter, see note 3, supra, Harrison had no foundation on which to conclude that this defect actually caused the accident. In refusing to let Harrison render an opinion on causation and in then granting a direсted verdict, the judge in effect struck the witness’ earlier statement on causation. 7
“Normally, the existence of proximate cause is a question of fact for the jury.”
Freeman,
B.
We deal briefly with Twyman’s contention that the trial judge abused his discretion in refusing to permit rebuttal testimony by one proposed witness (Abraham) and in restricting the rebuttal testimony of another (Ingraham). Twyman proffered the testimony, particularly of Abraham, to rebut a denial by Johnson’s earlier attorney, Kane, that in a telephone conversation with Abraham (then Twyman’s counsel) Kane had threatened that Johnson would raise the rent “and put Ms. Twyman out on the street.” The point was important, Twyman asserts, to establish her claim of abuse of process in the form of Johnson’s suits for possession filed thereafter.
The trial judge originally barred the testimony because Twyman called Kane as her own witness and then claimed surprise when he denied having made the statement, a claim of surprisе the judge rejected. When Johnson later called Kane as a witness on a narrower point, Twyman used cross-examination to elicit a fresh denial of the-threat, then sought again to introduce the disputed rebuttal testimony.
A party may not impeach its own witness unless it satisfies the trial court that the witness’s testimony was a surprise and affirmatively damaged its case. D.C.Code § 14-102 (1989).
See, e.g., Waldron v. United States,
C.
In the consolidated landlord and tenant action, the jury partiаlly accepted Twyman’s claim (both in her amended complaint in the civil action and in her counterclaim in the landlord and tenant suit) of substantial housing code violations, and awarded her a substantial abatement of the rent paid between April 1989 and June 1991, and due since July 1991. 8 Johnson does not challenge the jury’s finding of what amounted to a partial breach of the implied warranty of habitability. (Nor does she challenge the later award of attorney’s fees to Twyman under the Act.) She does contend, however, that (a) the trial judge erroneously permitted Twyman to assert as an affirmative defense to Johnson’s suit for possession the alleged retaliatory nature of the lawsuit; and (b) the judge erroneously allowed Twyman to assert an independent cause of action (both in her amended civil complaint and in her counterclaim to the possessory action) for retaliation based upon D.C.Code § 45-2552 (1990) (“Retaliatory Action”) — a claim on which the jury awarded Twyman $10,000 in separate damages.
*855
Johnson argues strenuously that, “as a matter of law, retaliation is available as an affirmative defense only in a complaint fоr possession based upon a notice to quit where the landlord seeks to terminate the tenancy,” in contrast to “[t]he action below, which was one for non-payment of rent in which Twyman could exercise her equity of redemption pursuant to the ‘Trans-Lux’ Doctrine
(Trans-Lux Radio City Corp. v. Service Parking Corp.,
Presented for decision, instead, is the issue whether Twyman could properly maintain a separate cause
of
action for damages under the anti-retaliation statute, D.C.Code § 45-2552. The issue is purely one of statutory construction because, as this court has recognized, that cause of action did not exist at common law. In Weisman
v. Middleton,
there is no authority in this jurisdiction establishing an independent cause of action by a tenant against a landlord based on an unsuccessful retaliatory eviction suit. The cases reflect the courts’ recognition of retaliatory eviction only as a valid defense to a landlord’s action for possession....
Id.
at 1002 (emphasis added). The cases referred to by the court were those originating with
Edwards v. Habib,
The present parties agree that Habib’s recognition of a defense of retaliatory eviction has been codified in statutory enactments in the District of Columbia since 1975. 9 In *856 deed, as embodied in the Rental Housing Act of 1985, the bar against retaliation is much more than a simple defense to a housing provider’s suit for possession. It is a broad prohibition against
any retaliatory action against any tenant who exercises any right conferred upon the tеnant by this chapter, by any rule or order issued pursuant to this chapter, or by any other provision of law. Retaliatory action may include any action or proceeding not otherwise permitted by law which seeks to recover possession of a rental unit, action which would unlawfully increase rent, decrease services, increase the obligation of a tenant, or constitute undue or unavoidable inconvenience, violate the privacy of the tenant, harass, reduce the quality or quantity of service, any refusal to honor a lease or rental agreement or any provision of a lease or rental agreement, refusal to renew a lease or rental agreement, termination of a tenancy without cause, or any other form of threat or coercion.
D.C.Code § 45-2552(a). The section goes on to require “the trier of fact” to “presume retaliatory action” in six enumerated instances, and to “enter judgment in the tenant’s favor unless the housing provider comes forward with clear and convincing evidence to rebut this presumption.”
Id.
§ 2552(b);
see De Szunyogh v. William C. Smith & Co.,
Against this remedial background, Twyman argues — and the trial judge implicitly agreed — that § 45-2552(a) goes even further and creates a cause of action for civil damages not heretofore recognized in this jurisdiction.
Weisman, supra.
10
We hold that it does not. “The question whether a statute creates a cause of action, either expressly or by implication, is basically a matter of statutory construction,”
Transamerica Mortgage Advisors, Inc. v. Lewis,
The legislature’s intent also “may appear implicitly in the language or structure of the
*857
statute, or in the circumstances of its enactment.”
Transamerica Mortgage Advisors,
The legislative history of the Rental Housing Act contains no discussion of § 45-2552. The committee report underlying the Rental Accommodations Act of 1975 states only that “[t]he retaliatory action section is an integral part of any rent stabilization program,” and that by providing for “civil remedies in addition to criminal [now civil infraction] sanctions,” the Council meant to encourage “tenants to pursue their rights under the act.”
13
This, of course, leaves unanswered exactly what those rights are. Twyman cites nothing in the statute or in the legislative history to support her argument, but relies instead on what this court has recognized to be the remedial purpose of the Rental Housing Act generally.
See, e.g., Goodman v. District of Columbia Rental Hous. Comm’n,
Administratively, a tenant is not left uncompensated when the landlord commits either of the core prohibited acts (unlawfully raising rent or reducing services) for which the Rent Administrator may award a rent refund or roll back. § 45-2591(a). Indeed, a factor the Administrator would likely consider in determining whether to
treble
the refund is the presence of a retaliatory animus.
See
14 DCMR § 4217.2 (“bad faith”). Furthermore, the tenant remains free, as in this case, to sue for damages for breach of the warranty of habitability based on actions (or inaction) which the landlord may have taken punitively.
See
note 1,
supra.
And still additional remedies are those already discussed — defensive use of claimed retaliation, administrative quasi-injunctive rеlief, and civil infraction penalties. Twyman’s argument at bottom is that, having preserved or created all of these remedies, the legislature must be assumed to have intended others, a proposition contrary to the normal rule for reading statutes.
See Karahalios, supra; Fountain, supra; cf. Suter v. Artist M.,
We therefore reject Twyman’s reliance on maxims such as “where there is a
*858
right there is a remedy,”
see Alabama Power Co. v. Ickes,
We hold that Twyman had no independent cause of action for damages for Johnson’s alleged retaliation, and that the judge erred in submitting that count of the amеnded complaint and the counterclaim to the jury. We therefore reverse the judgment awarding Twyman $10,000 for retaliation and remand with directions to dismiss that count. We affirm the judgment directing a verdict for Johnson on the count of negligence.
So ordered.
Notes
. As to the latter cause of action,
see George Washington Univ. v. Weintraub,
. Twyman's daughter had preceded her down the steps but had. turned a comer before the fall and was unable to describe the accident.
. At one point, Twyman’s expert, Harrison, testified without objection that a variation in the width of a tread was “what caused the fell." A short time later, however, the trial judge expressly refused to allow Harrison to render an opinion as to what had caused Twyman's fall because the testimony and exhibits, including Twyman's own testimony, provided no “factual foundation" for that opinion.
. It therefore is not the law in this jurisdiction that proximate causation is presumptively shown by proof of a safety violation alone when the injury “is generally of the kind intended to be avoided by the law or regulation involved.”
Bowman v. Redding & Co.,
.As we stated in Freeman:
[i]n this sense, proximate cause bears a resemblance to cause in fact. This latter element of a prima facie negligence case requires a plaintiff to introduce evidence which affords a reasonable basis for the conclusion that it is more
*853 likely than not that the conduct of the defendant was a substantial factor in bringing about the result.
. Even there, however, we have held that "the elements of res ipsa loquitur must be established with some precision,” and have sustained the grant of a directed verdict in favor of the defendant. Hailey v. Otis Elevator Co., 636 A.2d 426, 429 (D.C.1994).
. The parties debate whether testimony by Dr. Epps, Johnson’s orthopedic expert who was called out of turn during Twyman's case (and who had examined and spoken to Twyman), can fairly be considered in evaluating the sufficiency of Twyman's proof on causation. Assuming that it can, Dr. Epps's wholly unelaborated testimony about Twyman’s telling him two years after the accident that she had fallen because "[t]he steps were bad” did not fill the gap created by Twy-man’s inability in court to explain the cause of her accident.
.
See Javins v. First Nat’l Realty Corp.,
. Codificatiоn of the prohibition on retaliatory actions originated in the Reorganization Act, enabling the D.C. Council to pass a rent stabilization program. Pub.L. No. 93-157, § 5, 87 Stat. 626 (1973) (codified at D.C.Code § 45-1624 (Supp.1974)). Upon this authority, the Council passed the Rental Accommodations Act of 1975, which contained an anti-retaliation provision. D.C.Law 1-33, § 214, 22 D.C.Reg. 2529 (codified at D.C.Code § 45-1654 (Supp. III 1976)). In 1977, the Council passed the Rental Housing Act, D.C.Law 2-54, § 502, 24 D.C.Reg. 5393 (codified at D.C.Code § 45-1699.7 (Supp.1979)), which was reenacted in 1980, D.C.Law 3-131, § 502, 28 D.C.Reg. 361 (codified at D.C.Code § 45-1562 (1981)), and again in 1985, D.C.Law 6-10, § 502, 32 D.C.Reg. 3089 (codified at D.C.Code § 45-2552 (1990)).
. By "heretofore” we mean prior to stаtutory enactment of an anti-retaliation provision in 1975. We note that, although Weisman was decided in 1978, trial in that case apparently took place before enactment of the Rental Accommodations Act of 1975. In any event, the court never adverted to the 1975 statute, and it would be unreasonable to read the decision as having impliedly resolved the statutory issue presented here.
. Cf. also D.C.Code § 1-2556 (1992) ("Any person claiming to be aggrieved by an unlawful discriminatory practice [under the D.C. Human Rights Act, and including coercion or retaliation, § 1-2525] shall have a cause of action in any court of competent jurisdiction for damages-”).
.Similarly, the statutory reference to “the trier of fact" may be to the judge or jury in a suit for possession, the Rent Administrator in a complaint proceeding alleging retaliation, or even a hearing examiner considering imposition of civil sanctions for violation of provisions of the Rental Housing Act. See D.C.Code §§ 45-2591© (1990), 6-2713(e) (1989).
. Housing and Urban Development Comm, of the District of Columbia, Rental Housing Accommodations Act of 1975, Report on Bill 1-157 at 37 (July 31, 1975).
. Twyman is not happily situated to make this claim since the retaliation she alleged was the filing of two unjustified suits for possession and back rent.
