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A Florida fisherman put his life in danger when he jumped into the water with a 300-pound bull shark.

The fisherman reeled in the shark, removed the hook and released it back into the ocean. The exhausted shark failed to swim away so the fisherman jumped in. After a little push start, the shark swam off.

What's the risk? Bull sharks bite with the greatest force among sharks, USA TODAY's Dan Vergano reported last year. Pound-for-pound, the bull shark's bite is greater than great whites and hammerheads, biologists said.

Watch the video to see the fisherman swim with the bull shark with no protection.