During a routine checkup on a pregnant ragged tooth shark being moved to an isolated tank, she is unsettled and attacks one of the divers. This was a routine procedure for pregnant sharks that has been conducted successfully all over the world, but this time it don't work out so well, shredding the divers arm.Each one of those people who helped him get out of the water showed fearless commitment to rescuing their colleague.[video credit: Darrol Williams / licensing@viralhog.com]