This is what happens when a gorilla is eternally grateful to you.

My husband had the opportunity to operate on a gorilla’s knee once. They have essentially the same anatomy as humans, so they ask human physicians to operate on them in many major zoos. It was really cool, and afterwards they gave him a painting done by the gorilla as thanks. Apparently the gorilla was going through some adolescent rank-wars with other male gorillas and had his knee battered and bitten (through the meniscus!). I know, it’s his story, not mine, but he doesn’t get on the Internet, and I think it’s super cool and I’m really proud of him.