Grumpy Old Geeks Topics Chimpanzee knocks down a drone Topic Chimpanzee knocks down a drone 2 mentions in 1 episode A story about a chimpanzee at a Netherlands zoo knocking a drone out of the air with a branch. Mentions 105: The Lone Chimp Apr 17, 2015 30:25 a chimp that knocks a drone out of the sky 31:03 With a long branch.