I can not rule it out, I just find it unlikely, usually the easy solution is the correct one. I don't even know if chimpanzees are real, need to do more research on the subject. I know Hollywood been faking them, all those pictures of a chimpanzee smoking is just a person in a suit, I am not convinced all chimpanzees are fake though. They do have strong climbing skills and excellent balance. It's not impossible for a person to mimic their acrobatics, if you ever watched a circus performer. Something I have to look into.