Good Riddles

Question: Martha Speaks walked up to a fox and said, "what does the fox say?" What did the fox say?

Question: What is as big as an elephant but weighs nothing?

Question: What room does a ghost not need?

Question: What's a horse's favorite sport?

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?