How do you play the elevator riddle?

How do you play the elevator riddle? Riddle Answer: The man in the elevator is extremely short and cannot reach higher than the 15th floor button. When there is somebody else in the elevator, they can hit the button for him. When it is raining, he can use his umbrella to hit the buttons. Otherwise, he must take the stairs.

Riddle Answer:

The man in the elevator is extremely short and cannot reach higher than the 15th floor button. When there is somebody else in the elevator, they can hit the button for him. When it is raining, he can use his umbrella to hit the buttons. Otherwise, he must take the stairs.