Greg Wilfert, 71, said that he "started swimming like hell" when a shark grabbed onto his buoy and pulled him underwater off the coast of Scarborough Beach.

A lifeguard said a shark off the coast of Scarborough Beach in Maine grabbed onto his buoy and pulled him 5 feet underwater before he was able to get free.

Greg Wilfert said he swam away from the shark fast enough that he ‘could’ve beaten Michael Phelps’