Sometimes, even the auditions for reality shows can get controversial.

Survivor / Amazing Race contestant Rob Mariano ("Boston Rob") has been holding auditions for a new reality show he's producing called Tontine, and things got a little physical at a recent audtion in San Diego. Seems there was some sort of heckler at the audition who started saying things to Boston Rob. They got in each other's face, and a crew member tries to break up the two, but then all of a sudden Rob punches the guy, and the people filming it "oooo" and "ahhhh." Video after the jump (and check out the comments on YouTube, including a comment from the guy who stepped in the middle of the two and another guy who was auditioning at the time).

You never see this happen at the auditions for American Idol.