A chimp is a fucking ape. You can't domesticate chimps as common household pets.. it's not a fucking dog.. an animal that is the product of many generations of domesticated predecessors. It still has primal instincts. I do not understand people who insist on keeping animals like chimpanzees and then feign shock when shit like this happens. The average human has no idea what behavior might frighten or stimulate a chimp to react violently. They're very territorial and exhibit dominant behavior and kill fellow chimps in the wild. They're beautiful creatures and they're fascinating in that we share a very similar biological profile with them but they're still wild animals.