But for this Italian tourist who was visiting Australia, instead of freaking out like the rest of us, he was all about filming the whole crazy ordeal.
From TMZ:
The guy's name is Matteo Mariotti, and he's a 20-year-old student from the city of Parma -- however, last week ... he found himself snorkeling off the coast of 1770 Beach on the eastern shore of the land down under.
While he was in the water, Mariotti was recording with a selfie stick of some sort -- which captured the moments right after the shark bit his leg. It's pretty shocking, considering you can see blood start to flow all around him.
Mariotti was eventually able to swim close enough to land for a pal to yank him in and attempt to help. Soon, though, he was transferred to a hospital -- but it was too late to save his leg. It was reportedly amputated from the knee down, but Matteo still sounds grateful.
He writes, "I played this video a few moments after the last bite, I wanted to say goodbye, I never thought I'd survive that monster. Lost so much blood and my leg, I don't know if they're going to cut it all off or if it's going to be left in half but it doesn't matter now."
I gotta say, for just having your leg bit off by shark and amputated, this guy has rather sunny disposition.
I suppose positivity would be the best way to get through such a horrifying ordeal.