Bump this, Rondo! Referees fight back

During the Boston Celtics-Atlanta Hawks game Sunday, Rajon Rondo "obviously bumped" (David Stern's words) into a referee and was ejected. He might even get suspended.

Enough is enough! Here are eight videos in which the refs fight back. OK, so they might be accidental, but there's some serious zebra power going on here.

Ref trips LeBron James (watch the top of the screen)

Ref tackles Tennessee football player

Ref tackles South Caroina's Stephen Garcia

Ref does wrestler's work for him

Ref fouls Damon Jones and blames it on Chauncey Billups

Ref's errant arm smacks Detroit Lions player

Ref bumps Justin Bieber