I went to a zoo in Spain. Terrible place, but they had a great chimp. He used to knock on the window anytime someone passed by with a feeding bucket. He put on a show for everyone who watched him. He passed me out a blade of plant through a gap when the window met the wall of his house. When I pushed it back into him he took terrible offence and started sulking. Looking back and then looking away again in disgust as if he was throwing his eyes up to heaven. I came back to him later again and he and his friend were sitting together. When I arrived one of them looked up. I waved and he alerted his friend. Then when I started moving my head from side to side, I got a simulataneous face palm from both chimps. 22 years old and I got a huge kick out of it.
So sad though. The bear just walked around his cage. Same with the tiger, pacing the same ten yards over and over like he was demented. Horrible place. The chimp looked miserable aswell really. The saddest eyes I've ever seen.