Answer:
What has no hands but might knock on your door, and if it does you better open up?
You can do this with your friends. You can do this with your nose. But don't do it with your friend's nose!
What Can Fly Without Wings
You walk into a room with a match, a kerosene lamp and a fireplace. Which do you light first?
I make billions of dollars selling Windows. Who am I?
What is always coming but never arrives?