Logic Riddles

Question: I see you, you see me; I raise my right, you raise your left. What am I?

Question: What always goes left but constantly goes down.

Question: Why are pianos hard to open?

Question: In the books of a famous writter, How many letter in Those Books?

Question: A man in a wheelchair is being pushed across a hallway by his wife. When they get to the end of the hallway the man says: stop pushing me. His wife asks why, and the man gets up and starts walking. How did the man get up and start walking if he was in a wheelchair?