Man fends off Great White Shark in Australian harbor (VIDEO)

It's never really funny when you jump into the water and you hear some joker scream 'Shark!' and point in the general area where you are swimming.

It's even less amusing when you are in the popular shark feeding grounds of Australia.

That's what happened to this poor guy after he jumped into Sydney Harbour and found out his buddy wasn't kidding. And the panicked man captured all of his frantic fending off and escape from a Great White on his head-mounted Go-Pro.

Bare-handed, I might add.

Holy sh!t is right.