There was a building with 100 floors. A short man lived on the very top floor, the 100th floor. On sunny days, he would ride the elevator up to the 70th floor, then climb the stairs up the rest of the way. On rainy days, he would ride the elevator straight to his apartment, the 100th floor. Why?
He is short, so he can't reach the 100th floor button. On rainy days, he can use his umbrella to poke the button.