"Not every line of duty injury will result in an award of accident disability" ( Matter of McCambridge v. McGuire, 62 N.Y.2d 563, 567-568). To prevail in this matter, petitioner Hopp had to demonstrate that the incident giving rise to this proceeding was an "accident" within the meaning of § 13-252 of the Administrative Code of the City of New York. An injury is accidental if it occurs as the result of an unexpected event, rather than as the result of activities undertaken in the performance of ordinary employment duties ( see Matter of Lichtenstein v. Board of Trustees, 57 N.Y.2d 1010, 1012). Therefore, to annul the challenged determination by the Board of Trustees, it had to be established that there was no credible evidence to support the Board's rejection of petitioner's claim for ADR benefits, and that his injuries arose out of a sudden, fortuitous event which is out of the ordinary and injurious in impact ( see Matter of Starnella v. Bratton, 92 N.Y.2d 836, 838; Lichtenstein, supra).
Petitioner has failed to meet this burden, because the claimed incident does not constitute a sudden mischance over which he had no control. Even if the property room was in a littered state with equipment scattered haphazardly around the room, there is no evidence suggesting that petitioner was unaware of this condition. By his own admission, instead of rearranging the unstable speakers to gain easier access to those he was sent to retrieve, he created, or at the very least, exacerbated the danger of a sudden misstep by standing atop the set of unstable speakers. Accordingly, as a matter of law, petitioner's injuries were not caused by an accident as that term is used in the Administrative Code provision applicable to accident disability benefits ( see Matter of Rosenthal v. Board of Trustees, 252 A.D.2d 388, lv denied 93 N.Y.2d 801).
THIS CONSTITUTES THE DECISION AND ORDER OF THE SUPREME COURT, APPELLATE DIVISION, FIRST DEPARTMENT.