Years ago, I had an open pizza box sitting on a table. The cat decided to walk over and get some pizza, but he stepped confidently from a chair onto the unsupported lid of the pizza box and fell through to the floor.

In and of itself, it's not particularly humorous, but when I add in the way he looked around to see if anyone noticed and tried to pretend that was what he wanted to do, it gives me a chuckle.

That was long ago, and we don't have cats now. We have guinea pigs. I taught the guinea pigs to spin in a circle once to get a treat. Now if I'm taking too long giving them their treat, they just start spinning non-stop.

They also chew the bars of their pens. I think they think it gets us to feed them faster (it doesn't). One of them will get so involved in chewing the bars that I she forgets why she's doing it and doesn't come to eat when the food is available. We have to gently poke her in the nose until she stops chewing and realizes that there's food.