Kid Rock fans "mooned" after Pa. concert, police officer arrested after getting involved

(CBS/AP) BURGETTSTOWN, Pa. - If a man exposes his buttocks to a busload of fans who just left a Kid Rock concert, is that a moon rock?

Police say an off-duty officer from central Pennsylvania punched a man who allegedly "mooned" people on a bus after a Kid Rock concert near Pittsburgh Saturday night.

Altoona Police Officer Matthew Plummer was charged with aggravated assault by Hanover Township police following the concert at the First Niagara Pavilion.

Police said Plummer was riding on the bus which allegedly was mooned, and that he then exited the vehicle to confront the "mooner."

Court papers indicate Plummer believed the "moon man" had also thrown a bottle at the bus. The other man denied that, but allegedly tried to punch Plummer before he was hit.