Breaking the Sound Barrier... on Horseback!
RAY: We discovered this phenomenon in the locker room in high school, with a wet towel. We would wet the end of a towel and you'd snap it, and it would make a loud, 'crack'!
The tip of the wet towel when it snapped at the end was going faster than the speed of sound, and that's why it hurt so much when we caught somebody in the butt. But the end of a whip is also traveling faster than the speed of sound.
It's creating a little sonic boom. Pretty cute, huh?
[ Car Talk Puzzler ]