Great white sharks have about 50 exposed teeth at any given time (with up to 250 more stored inside their jaws as backups), giving me about 300 reasons why I have no desire to ever be in the water with one.
A braver cage diver than I would ever be got a good look at all those teeth in Mexico when a huge great white shark broke into his cage while he remained inside.
Somehow, magically, he emerged from the cage unharmed, which the videographer attributed to sharks becoming temporarily blind when they lunge to bite something.