BRAIN TWISTER #2
A man lives on the seventh floor of an apartment building. Every morning he takes the elevator down to the lobby and leaves the building. Upon his return, however, he usually gets off at the fifth floor and has to walk up 2 floors - unless it's raining.
What's the explanation for this?
The man is extremely short. He can't reach the upper elevator buttons, but he can ask people to push them for him. He can also push them with his umbrella.