"The Scientist and the Frog" joke

There was a scientist who was studying frogs.

The scientist told the frog to jump, so the frog jumped, and he jumped 4 feet. So the scientist wrote in his notebook: a frog with 4 feet jumps 4 feet.

The scientist then cut of one leg. He told the frog to jump, so the frog jumped. He jumped 3 feet. So the scientist wrote in his notebook: a frog with 3 feet jumps 3 feet.

The scientist then cut off one more leg. He told the frog to jump, so the frog jumped. He jumped 2 feet. So the scientist wrote in his notebook: a frog with 2 feet jumps 2 feet.

The scientist cut off one more leg. He told the frog to jump, so the frog jumped. He jumped 1 foot. So the scientist wrote in his notebook: a frog with 1 foot jumps 1 foot.

The scientist cut off the last leg. He told the frog jump, Jump, JUMP!

But the frog did not move. So the scientist wrote in his notebook: a frog with no legs goes deaf.