The man and a friend were filmed stalking a tiger shark that was hooked on a fishing line towards the shore on Wrightsville Beach, North Carolina, US, on June 29.
One of the men tries to grab the shark’s tail but fails on his first attempt.
But as the shark makes a desperate getaway, the plucky bloke tries once more to catch it by hand.
He instantly regrets his reckless decision, as the shark viciously strikes back against the unwarranted wrestling match.
Blood can be seen gushing into the ocean, turning the water surrounding the man deep red as he runs to shore, holding his arm.
The 4ft shark was eventually pulled into the shore before the hook was properly removed.
It was then released back into the ocean by helpful onlookers.
“Sharks are wild animals and so we definitely don’t want to be messing around with any wild animal,” Gail Lemiec from nearby North Carolina Aquarium said.
By the time medics arrived at the beach the man had already disappeared.
So far in 2017 there have been 26 reported shark attacks in the US.
Last month, a woman in Concord, also in North Carolina, lost her arm to a huge shark while snorkeling.