Answer:
Of these things - I have two. One for me - and one for you. And when you ask about the price, I simply smile and nod twice.
A man calls his dog from the opposite side of the river. The dog crosses the river without getting wet, and without using a bridge or boat. How?
He's dead with a metal bar across his back. When a woman sees him, she is very pleased. This was all perfectly legal. What's going on?
What is it that no man ever yet did see, which never was, but always is to be?
If a man carried my burden, he would break his back. I am not rich, but leave silver in my track.
What is the middle of water but is not an island?