A Magician was doing his stage show in front of a big audience but saw he wasn't getting anywhere. After trying all the 'tricks', in desperation, he called a big, muscular man out of the audience.
"Sir, I'd like you to take this 20 pound sledge hammer and hit me as hard as you can right in the head."
The man refused.
The magician then said, "Sir, I am a professional. This is the Greatest Illusion. Besides, there are hundreds of witnesses, hit me as hard as you can right in the head with the hammer."
The man shrugged, did it, and the Magician went flying across the stage, hit the wall, and immediately fell into a coma. He was rushed to the hospital, and remained in the coma for years.
Ten years later, he came out of the coma, looked around, and said "Ta DA!!"