A pet capuchin monkey bit a man in Florida. His injuries are minor. Capuchins aren't especially big, but they've been known to cause serious injuries by biting repeatedly. In a 1997 case, one of them nearly killed its owner and amuptated some of her fingers.
The video linked below shows firefighters trying to capture the monkey. They eventually succeeded.
Monkey Gets Loose, Attacks Man - Video - WPLG Miami