How to do science (short story)

J1 has been at home sick the whole week. Each day, he writes a journal entry, usually a short story.

How do people jump?

One day, Ms. Jump got a call from Ms. Silly. She asked her to go to her home to jump for her
because she was doing research on how to jump.

When Ms. Jump got to Ms. Silly's home, she gave Ms. Jump 50 pounds as payment.
So Ms. Jump jumped and Ms. Silly recorded the jump.

Ms. Silly said, "Oh, now I understand. We make our head go up and down to jump!"