The man who invented the shark cage did so after being mauled by a great white shark!

In December 1963 (oh, what a BITE!), Australian scuba diver Rodney Fox was competing in a spear-fishing competition. The dead fish he was carrying attracted a shark that attacked Fox to within an inch of his life! The attack broke all the ribs on Rodney's left side, his upper stomach was fully exposed, lung ripped open, and he was minutes away from bleeding out entirely! Keeping his wetsuit on was likely the reason all his internal organs stayed together, and miraculously the main artery leading from his heart to his stomach was exposed but unharmed! A total of 462 stitches were required to patch Fox up, and he still has a shark tooth lodged in his wrist to remind him of that fateful day.

Given the fact that Rodney somehow managed to survive one of history’s worst non-fatal shark attacks, you would think he would avoid sharks or deep water altogether for the rest of his life. However, this is not the case at all. He went on to design the world’s first underwater observation cage and has continued to film and study his lethal foe for over 40 years! Over that span, Rodney has been involved in the production of nearly every shark feature and documentary film, including Jaws.
(source)