[ 1 The facts in this review proceeding are undisputed but capable of differing inferences. - Claimant, William L. Milligan, worked for Employer, Milo Gordon Chrysler Plymouth Isuzu. At the request of Employer, Claimant drove a motoreycle to a business establishment to obtain an appraisal. While on a direct route back to Employer's place of business, Claimant lost control of the motorcycle while "popping a wheelie." He sustained an accidental personal injury to his right arm, leg and ankle, as well as head, neck and shoulder injuries.

12 Employer defended the claim on the ground that Claimant was injured while engaged in "horseplay." The trial court found Employer requested Claimant to operate the motorcycle in furtherance of its business, and that while the manner of operation may have been careless and reckless, it was not disconnected from his performance of the duties of his employment. The trial court found Claimant sustained an accidental personal injury arising out of and in the course of his employment and awarded him benefits for permanent partial disability.

T8 Employer sought review by the three-judge panel, The panel, with one dissent,1 vacated the trial court's decision as contrary to law and against the clear weight of the evidence. Claimant seeks review of this order.

14 There are two elements to the "horseplay" defense, The activity must be (1) independent of and (2) disconnected from the performance of any duties of the employment. Horn v. Broadway Garage, 1940 OK 81, 186 Okla. 535, 99 P.2d 150. The defense is most often, but not exelusively, associated with fights or workplace pranks engaged in between two or more employees. See Horn v. Broadway Garage, Id., where the employee attempted to shoot a paper clip with a rubber band and injured his eye.

15 Employer and Claimant discuss the case of Darco Transportation v. Dulen, 1996 OK 50, 922 P.2d 591. In that decision the Supreme Court affirmed the trial court finding that the injury did not result from horseplay. Whenever conflicting inferences may be drawn from undisputed facts, the *166issue is not one of law but rather of fact. Id. at 594. It is only in the absence of competent evidence that a trial tribunal's decision may be viewed as erroneous as a matter of law and thus subject to appellate vacation. Id. Also see Canida v. Technotherm Corp., 2000 OK 83, 16 P.3d 1127, where the Oklahoma Supreme Court sustained an order denying compensation based on horseplay by finding competent evidence to support the order. The Supreme Court vacated the opinion of the Oklahoma Court of Civil Appeals, which had reviewed the evidence and rechar-acterized it by stating the employee had tried to avoid the horseplay as opposed to joining in it. The Supreme Court held that where there are conflicting inferences arising from undisputed facts, it is for the trier of fact to decide which theory is more likely true. Id. at 1129.

T6 We cannot say that as a matter of law the conduct at issue in this case could never be considered horseplay by a fact finder. The inferences could support a decision either way. The act of "popping a wheelie" could be considered independent of and disconnected from performance of employment duties. Therefore, competent evidence supports the panel's order and we are not at liberty to overturn the three-judge panel.

17 SUSTAINED.

dissenting:

11 I dissent. The majority's holding is based on its determination inferences from the undisputed facts could support a decision that Claimant's act of "popping a wheelie" constituted horseplay. That rationale erroneously relies on causation. While there is clearly competent evidence to establish Claimant's "popping a wheelie" caused the accident which resulted in his injuries, enactment of the Workers' Compensation Act in 1915 eliminated an employee's culpability as a defense against an employer's liability. Darco Transportation v. Dulen, 1996 OK 50, 922 P.2d 591.

€ 2 That Claimant was "popping a wheelie" at the time of his accident merely goes to the question of how he was performing his assigned work task. The majority recognizes Claimant was driving the motorcycle at Employer's request on a direct route back to Employer's place of business. It is the act of driving the motorcycle, the assigned task, which is determinative here, not the act of "popping a wheelie." The majority ignores the precedence of Duilen.

T 3 In Dulen, the question was whether the horseplay defense would apply because there was controverted evidence the claimant was having sex with the co-driver of his tractor-trailer rig at the time it was hit by a train. The Dulen Court noted, even assuming the claimant was having sex while driving the rig:

. uncontroverted is the stubborn fact that Dulen, when injured, occupied his assigned work station, the driver's seat behind the steering wheel of Darco's truck. The record offers no proof that Dulen had deviated from or abandoned his master's mission (transporting goods to San Fran-ciseo).

T4 It is equally uncontroverted here that Claimant, when injured, was occupying his assigned work station, the seat of a motorcey-cle he would not have been riding if not for Employer's request. Further, as in Dulen, there is nothing to show Claimant had deviated from or abandoned Employer's mission, returning the motoreycle to Employer's place of business.

T5 Duien, at 596, notes that our jurisprudence "strongly militates" against withholding benefits for misconduct "that platnily falls short of workstation abandonment." (Emphasis in original). Contrary to assertions regarding causation, the more appropriate question to examine is whether "[C]laim-ant's conduct is to deemed horseplay-a complete departure from or abandonment of his employment." - Dulen, at 595. (Emphasis in original).

T6 The line of reasoning in Dulen is consistent with that of earlier holdings where horseplay has been asserted as a defense. Neither Employer nor the majority cites a decision, and I have been unable to find any, *167where horseplay has been successfully maintained to defend against an employer's liability for injuries sustained while an employee was actually performing an assigned task.

17 Review of cases where the horseplay defense has been allowed reveals the actions leading to injury were clearly disconnected from the performance of any duties of the employment.1 As the trial court properly held, here there is no competent evidence that Claimant's actions in riding the motorey-cle were disconnected from his assigned task of transporting it for the purpose of appraisal.

18 Applying the horseplay defense to the facts here is an unwarranted expansion of our established jurisprudence. The only Oklahoma case I have found with analogous facts is Dulen. There, even assuming the claimant was having sex while driving, the Supreme Court found the claimant had not abandoned his assigned work station and sustained the Workers' Compensation Court's award of benefits.

19 In my view, the trial court and the three judge panel dissent correctly found Claimant could not be denied benefits for contributory negligence. - The Workers' Compensation Act, at 85 O.S. Supp. 1999 §§ 11 & 12, unambiguously imposes liability on employers for work related disability "without regard to fault as a cause", and bars employers from pleading contributory negligence as a defense. Section 11 does provide for certain defenses, but Employer has failed to prove any here.

1 10 I would vacate the three judge panel's order on appeal and reinstate the trial court's order awarding benefits.