No matter how many times you've watched the film and you know that it's coming, you're still under prepared for the arrival of Ben Gardner's watery corpse. It makes it worse that they did it during a night time dive, because although a one during the day wouldn't have been any less scary, but maybe it would have looked less deathy without Hooper's torch shining on him. There are chances that you'd lose more than the tooth if you were in Hooper's position, but either way, you're going to need a clean pair of pants.