The guys at Mythbusters kicked off Shark Week by exploding (literally) some of the misconceptions about sharks based on the classic film “Jaws.” Results: the shark in the movie was much much bigger than any shark on record. No shark could plausibly hold down three flotation barrels. No shark could plausibly tow a boat the size of the Orca. A large shark could plausibly damage the hull of a boat and could seriously damage an aluminum shark cage. If you punch a shark in the nose, you could plausibly drive it away. And as regular Jonah fans already knew, shooting a scuba tank with a rifle does not make it explode.