I feel terrible for his family.
Having said that, I don't think it should come as a complete surprise that someone got killed during the making of a show called "The Ocean's Deadliest...."
I mean, its like me making a show called "The Worlds most Dangerous stunts" and then getting killed while attempting one.
RIP Mr. Irwin, you were a talented man with a great personality, I hope your family is ok.