There is a man who lives on the top floor of a very tall building. Everyday he gets the elevator down to the ground floor to leave the building to go to work. Upon returning from work though, he can only travel half way up in the lift and has to walk the rest of the way unless it's raining! Why?

Answer: He is a midget and can only press halfway up the buttons of elevator on returning home,

but if it's raining he has an umbrella with him and can press the top button easily.