Police are looking an unidentified teen who attacked James Addlespurger, a teacher at the Pittsburgh High School for the Creative and Performing Arts, in downtown Pittsburgh.
A building surveillance video (below) shows Addlespurger walking by a group of teenagers when one of the teens suddenly hits him, reports WTAE-TV.
Addlespurger falls and hits his head on the curb as the teens walk away.
Addlespurger teaches English at the Pittsburgh High School for the Creative and Performing Arts. He is reportedly recovering.
Anyone with information regarding the incident is asked to call the Pittsburgh police at 412-323-7800.