A sharpshooter hung up his hat and put on a blindfold.
He then walked 100 yards, turned around, and shot a bullet through his hat.
The blindfold was a perfectly good one, completely blocking the man's vision.
How did he manage this?
The sharp shooter hung up his hat on the barrel of his gun.
So while walking the 100m the hat was with him, covering the barrel.
He could not miss.