Answer:
A man goes upstairs to grab his time machine. He walks downstairs then goes back in time 200 years. Why did he go downstairs?
When is homework not homework?
Which bank is not used for storing money?
What always comes into a house through the keyhole?
What can fill an entire room without taking up any space?
Not born, but from a Mother's body drawn. I hang until half of me is gone. I sleep in a cave until I grow old. Then valued for my hardened gold.