@DrewDad,
Not sure anyone was a douchebag. They were there tuna fishing...and the intent was not hunting shark. This seems to be a case of self-defense, but that could be hard to define and debatable about what was aggressive behavior by the shark's moves .
"Regarded by many as two of the world's best free diving spearfishermen, Mr Clasen and Cameron Kirkconnell have come into contact with thousands of sharks.
Watching from the boat, Mr Kirkconnell is sure Mr Clasen the right decision. 'We had been in the water all day and had caught lots of tuna,' he explained.
'But every dive we do is a shark dive and at certain times of the year, especially in Louisiana, we expect to see between 50-100 sharks from 7-12 ft.
'This encounter was so rare though. This shark must have thought it was an easy kill for him."