Some of them are helarious.
My 1/2 blind guy will push his belly right up to the cage for a scratch, and in moving for me to get the right spot he rolls right off the shelf. He 's in a low cage because of his lack of sight,so he don't fall far at all.
It is the funniest thing to watch, the little heads turning side to side, upner here, no there, they really get on like a dog that way. Then my cat loves it too, and just as she does I see the chins scrunching their little noses in delight.