In this appeal, the appellant, Holiday Inn, is contesting a judgment entered on a jury verdict rendered in favor of the appellee, Diane Ventura, by the Circuit Court of Monongalia County. We agree with Holiday Inn that there were errors in the conduct of the trial, particularly the failure of the trial court to instruct on assumption of risk and the lack of qualifications of Ventu-ra’s damage expert, and we therefore reverse.
On April 27, 1984, Diane Ventura was a college senior and a member of the Rutgers tennis team. That year she had played at the number three position and compiled a 15-4 record. She was staying with the team at the Holiday Inn in Star City, West Virginia, while the team competed in the Atlantic 10 Tennis Tournament being held at West Virginia University. That night fellow members of the team surprised Diane with a water battle. She attempted to run away from her friends, and ran thirty feet beyond a walkway, into an unlit area, and fell over a steep bank. The fall injured her right knee. The injury has shown not to be a crippling one, but it has given her continuing trouble in several areas, such as climbing stairs and running or jumping, and, most notably, has inter *84 fered with her ability to play competitive tennis. She sued for negligence in the Circuit Court of Monongalia County. The jury awarded Ventura $147,000 for the injury. Holiday Inn raises several assignments of error which we now discuss.
I.
Several points of error merit only short discussion.
At trial, Holiday Inn attempted to introduce a site plan of its property to show that the steep bank was not on its property. The trial court allowed the site plan to come in, but would not let it be used to- show boundary lines unless the surveyor was present to authenticate it. We find no error in the trial court’s ruling. None of Holiday Inn’s witnesses could say with certainty that the site plan showed the true boundaries, and the plan itself was ambiguous on that point.
Holiday Inn further argues that Ventura had the burden of proving that the hazard,
i.e.,
the steep bank, was on Holiday Inn property or that Holiday Inn had knowledge of the dangerous condition. We agree. The owner of a hotel can only be held liable for failing to warn a guest about a defect on property not his if the property is immediately adjacent to the hotel,
1
the hotel knew or should have known of the defect, and the defect is of such a nature that a reasonable hotel operator would have warned his guests.
See generally
Annotation,
Liability of Operator of Business Premises to Patron Injured by Condition of Adjacent Property,
Another assignment of error is that Holiday Inn was not allowed to put on evidence that no prior falls of this type had taken place at the embankment. We have had occasion to speak on this subject before. In
Barnett v. Coal & Coke Ry.,
Finally, evidence showed that the Rutgers’ women’s tennis team often conducted water fights at the hotels where they stayed. During previous matches at other hotels there had been several such fights. On one occasion certain hotel rooms had to be dried out because the walls were soaked with water. Ventura had participated in some of these fights in the past. A question arises as to the extent of the innkeeper’s liability for an injury to a guest caused, at least in. part, by horseplay of the victim and other guests. The general rule is that the hotel must exercise reasonable care to restrain its guests where there is a foreseeable risk of danger.
See, e.g.,
syl. pt. 1,
Connolly v. Nicollette Hotel,
Holiday Inn complains that the omission on the jury form of Ventura’s fellow team mates, and their last-minute addition onto the form by the trial court during the jury’s deliberations, prejudiced
*85
Holiday Inn, not allowing them the benefit of the horseplay defense. We disagree. Holiday Inn did not timely request Ventu-ra's team mates to be included on the jury form, and no objection was made to the team mates being added late. It is therefore waived on appeal.
See Konchesky v. S.J. Groves & Sons,
II.
In a more serious assignment of error, Holiday Inn objects to the trial court’s refusal of an instruction to the jury on assumption of risk. Generally, a jury instruction should be given if there is evidence in the trial which would support such an instruction and it was requested.
See
syl. pt. 2,
Brammer v. Taylor,
Analogous cases support our holding that assumption of risk is a proper defense in this situation. In
Newell v. Zurich Ins. Co.,
There being sufficient evidence before the jury from which it could have found an assumption of risk by the plaintiff, the defendant, Holiday Inn, was entitled to an instruction on that defense. It was error for the court to withhold it. 3
*86 III.
Holiday Inn also objects to the various experts used by Ventura to prove her injury. Ventura’s experts ran from the top to the bottom of the scale, superbly qualified, qualified, and unqualified. We will examine all three.
The most qualified expert Ventura called was Dr. K. Douglas Bowers. Dr. Bowers testified as to the extent of the injury to Ventura’s knee. He was an orthopedic surgeon, specializing in sports medicine, who had been practicing nineteen years. He was also the treating physician. Thus, Dr. Bowers could rely on his own observations and a wealth of experience in the narrow specialty of sports medicine over his nineteen years of practice. It was quite fortunate that such a qualified physician was treating Ventura and was available as a witness for trial. Dr. Bowers would qualify under any definition as an expert witness.
Two other expert witnesses, Frank Ferrante and Ralph Plummer, lacked the outstanding qualifications exhibited by Dr. Bowers. Nevertheless, they were still qualified as experts. West Virginia Rules of Evidence, Rule 702 liberally allows a witness to testify as an expert:
If scientific, technical, or other specialized knowledge will assist the trier of fact to understand the evidence or to determine a fact in issue, a witness qualified as an expert by knowledge, skill, experience, training, or education may testify thereto in the form of an opinion or otherwise.
Thus, the key test is whether the witness has specialized knowledge that will assist the trier of fact. Dr. Plummer was called to testify that the embankment was not properly guarded. He was a professor of industrial engineering at West Virginia University. He was also the director of the Occupational Health and Safety Engineering Program at WVU, taught courses in safety engineering, and had done consulting work with companies for safety evaluations of their facilities. Nevertheless, he admittedly had not done any specific research with unguarded slopes of the type in question. Despite his lack of specific knowledge of unguarded slopes, it is obvious from his education and background that he would have more than a passing knowledge of the subject. His insights would assist the jury in making a decision.
Another witness in the same category is Frank Ferrante. Mr. Ferrante was Ventura’s tennis coach in high school. His weakness as a witness is that he did not see her play tennis in college. Therefore, his knowledge of her abilities is based only upon her record in college and his memory of her as a high school player. His qualification as an expert is that he has been intimately involved in tennis since he was nine years old. He currently is sponsoring two players on the professional circuit, and he at one time played on the circuit himself. These strengths, plus a familiarity with Ventura, would make his opinions helpful to the jury. Therefore, he also is qualified as an expert witness.
The last expert called was Thomas Ser-pento. Mr. Serpento was called to state what Ventura’s future earnings would have been as a tennis professional. He had a master’s degree in vocational counselling and guidance and was employed by West Virginia University in the capacity of Director of Human Resources on teaching personnel. Mr. Serpento admittedly knew very little about tennis and had no training or experience on the salaries of tennis professionals. To arrive at an opinion, he obtained the May, 1985, issue of Tennis Week Magazine, which stated the earnings of the top forty ranked players in the country. He took an average from those figures, testified that a tennis player’s productive life on the circuit would be approximately ten years, claimed that he reduced the projected figures to present value, and came up with a figure of $737,317.00.
Several errors were made with respect to this witness. First, he was qualified as a vocational expert. No attempt was made to try to qualify the witness as an expert in tennis salaries, for which he
*87
was called to testify.
4
He also testified that the' average productive life span of a player on the circuit was ten years. The witness admittedly had little knowledge of tennis. He was not qualified to give this opinion. Further, the witness claimed he reduced the figure to present value, but no showing was made that he knew how to do this, or what interest rate he used or calculations he made. Finally, the whole basis for his opinion was an issue of
Tennis Week Magazine.
Assuming all the foregoing was forgiven,
Tennis Week Magazine
is not the kind of publication on which an expert may base his opinion. Experts may base their opinions on treatises and publications in their professions, but must first show the authoritative nature of the works.
See Apicella v. McNeil Laboratories, Inc.,
In summary, Mr. Serpento was not qualified to give an opinion on the issue of lost earnings in this case. It was error to allow him to do so.
For the above reasons, the decision of the Circuit Court of Monongalia County is reversed, and the case is remanded for further proceedings consistent with this opinion.
Reversed and remanded.
Notes
.
See Stedman v. Spiros,
. While relevant, prior nonoccurrence of an accident is relatively weak evidence, and we would not have reversed the case on this issue alone.
. An error not raised by the parties is the effect of comparative negligence on the assumption of risk defense. There is no general rule among the various jurisdictions on this matter, but instead it varies widely.
See Heft & Heft Comparative Negligence Manual
52 (1986). Some states still allow the assumption of risk to be a complete bar to recovery.
See, e.g., Maddox v. City of New York,
In West Virginia, assumption of risk and contributory negligence have traditionally been separate defenses.
See Spurlin
v.
Nardo,
. While a vocational expert may be able to qualify as an expert in salaries for normal occupations, this witness had no training in the field of professional sports.
