The buttered cat paradox is a common joke based on the combination of two adages:

Cats always land on their feet.
Buttered toast always lands buttered side down.
The paradox arises when one considers what would happen if one attached a piece of buttered toast (butter side up) to the back of a cat, then dropped the cat from a large height. The buttered cat paradox, submitted by artist John Frazee of Kingston, New York, won a 1993 OMNI magazine competition about paradoxes.[1][2] The basic premise, stating the conditions of the cat and bread and posed as a question, was presented in a routine by comic and juggler Michael Davis, appearing on The Tonight Show with Johnny Carson, July 22, 1988.[3] given.