I watched a Polar Bear watch me today. I was FAR more impressed with the polar bear than the polar bear was with me.
But we watched each other rather intently for several minutes. Then he decided to go put his front paw in some water and chew on it for a bit. He bored of that and came back to look at the people. Then he went for a swim. It took several minutes of contemplation before he went IN the small pool, but finally "swim" won over "watch the people".
What do the zoo animals think of the people who peer at them. Surely they detest those who yell at them to wake up. I'm also sure there is a barking dog in the middle of the night for those people, just waiting for the proper timing. Animals are karmic like that.