Original post here. A BMW motorcycle is used to pull the tablecloth from under a banquet table with full formal setting. Go back and watch the videoclip.
Mythbusters story web clips: Tablecloth Chaos.
Executive Summary: Jamie was able to clear the tablecloth from under the banquet table setting. But only when he was able to get his custom bike to high speed before pulling the tablecloth. This required that the bike accelerate a distance with considerable slack in the rope.
The trick, as performed in the BMW ad, is not physics-ly possible. You simply cannot start from rest and jump to cloth-pulling speed on a motorcycle.
Shame on you, BMW.
Hat tip to Dan Burns via the AP Physics EDG.