A Man Wants To Cross a Bridge
...but a knight won't let him unless he answers three questions correctly but with each wrong answer, the knight promises to cut off parts of his body.
The man agrees. The first question is incorrect and the knight chops off his arms.
Likewise, the second question is incorrect and the legs were sliced off.
Lastly, he answers the third one incorrectly and off his head goes when the knight separates it from its torso.
"Shall we have a fourth question?" Asked the knight.
The man replied, "I should quit while I'm a head.