Gorillas are interesting creatures. At times, they seem like wild beasts. They have insane strength and speed, and the last place you want to be is near one that's angry. But often times they can seem very human.

Take, for example, this gorilla in a zoo. You can see him walking around, peeking over at the workers at the edge of his pen. Little do they know that he has quite the surprise lined up for them. If you watch, you can even see him peek over to make sure that they aren't watching. What do you think, mean-spirited or just a cute prank?