A fourth Primate Behavior viral video for Rise of the Planet of the Apes has been discovered, and this particular clip offers up a Chimpanzee terrorizing a group of West African soldiers with an AK-47. This clip reportedly comes from director Rupert Wyatt's own private stash of video tapes, which he used for inspiration in making this upcoming summer reboot. Check it out below.

B. Alan Orange at Movieweb
B. Alan Orange