Here's a riddle: How'd you get the same username as me? :S
OK here's an excellent riddle, and very tricky --
A man has been found dead in a telephone box in a local park. He was on his own, but did not commit suicide.
Tell your friends they can ask any question they want (apart from the obvious) in order to tell you how and why the man died.
The answer they should aim for in the end is: He accidentally cut himself with glass when he was enthusiastically describing on the phone to a friend about -- "The fish was THIS big!!"
Crazy, but still, people can get to the answer.