It goes without saying that shark diving is not for the faint of heart. Though you might be lucky enough to witness the awesome spectacle of a great white hurtling out of the sea, the real treat begins when you're locked into a steel cage and lowered underwater. There you will be in the middle of a churning war zone of the ocean's most formidable predators as they are driven into a feeding frenzy. On the bright side, you can wet yourself and nobody will know...