Blood Surf (2000)

A pair of entrepreneurs with more bravery than brains hits upon the idea of blood surfing: spreading chum in the water to attract sharks, then hopping on a surfboard and riding through the middle of the pack. As they're filming their promotional documentary, the fun gets interrupted by a 30-foot-long salt-water crocodile that begins snacking on everyone in the expedition. Will any of them make it back to civilization?