Riddle: A very tall man and a very hard turtle and a very lonely scorpion are next to a river and so they decide to have a swim race... "whoever can go on to the other side of the river first is the winner" says the scorpion.....but who WILL WIN?
Answer: The lonely scorpion will win because actually the very tall man is really just a tree and the very hard turtle is actually a rock (the clue is that the scropion was very lonely so it thought the rock and the tree were it's friends)
Source: https://www.riddles.com/9528