Here’s a fascinating story. This guy was so convinced gorillas are different than other animals. The article even note “[t]here is no record of a gorilla ever killing a human.”
It’s really an amazing video to watch. Also: toddler + gorilla is a video you can’t loose with.
I remember seeing the original demonstration before. Since I had heard about the experiment before I knew to expect the gorilla. The new 2010 version introduces a few new tricks to prove the concept even further. If you’ve got an interest cognitive science, this is pretty cool stuff.