Australia is well known for its sharks; if you're surfing off the coast there's always a chance you'll bump into one of the depth's scariest predators. But about 100 of them going gangbusters devouring a whale up on the beach -- you don't see that everyday.

This shark-infested scene was captured by Rachel Campbell while out on the beach in northwestern Australia. I think I'd run for the hills and never go near the water again after witnessing that little lot, but Campbell is obviously more of a man than I am -- she and her mates just went 1.5km out to sea to go surf anyway. [Vimeo via Billabong Girls via iO9]