It depends on how you land. If you don't push hard enough, you may land feet first, and that doesn't hurt at all. If land just short of a dive, you'll bellyflop. I've done that, and hurts. But trust me on this one: push off a lot harder than you think you need to. Make sure you spin your body fast (all of this is if you don't have a diving board. If you do own one, it's a lot easier), and you'll land head first.