An American River College professor has been placed on leave after a martial arts demonstration in his classroom resulted in the injury of a student.

Geoffery Stockdale's classes will be taken over by his colleagues as the incident is investigated.

Cell phone video from Oct. 14, that was uploaded to YouTube shows two men wrestling on the floor before one bumps his head and begins bleeding. Stockdale did not intervene. He's a long-time communications professor.

Read More: Injury During Class Demonstration Causes Concern at ARC