Jungle Justice...

From Wikipedia: When threatened, the Ring-tailed Lemur has been known to strike out with its short nails in a behavior termed 'jump fighting'. This action is extremely rare outside of the breeding season when tensions are high and competition for access to mates is intense. Only one attack on a human by a Ring-tailed Lemur has ever been documented in America. The event happened at the Minnesota Zoo in Apple Valley, Minnesota after a small boy entered the Ring-tailed Lemur exhibit while on a school field trip and threw a pebble at the Lemur. The boy was scratched and bitten, and taken to hospital. The Ring-tailed Lemur that attacked was euthanized later that day.