A couple of divers in Gansbaai, South Africa, had a close call with an angry shark, and caught the whole thing on video. The thrill seekers laugh when the great white attempts to tear them to shreds with his sharp teeth, and fails. Not sure how hilarious they would find it it without that metal cage though.
It's hard to watch this and not feel bad for the shark. What if someone put leftover Halloween candy in a cage and then laughed at you when you went in for a big bite? No fair!