Sam Sherwood was watching his friend Adam Porter as he waited to catch a wave along an isolated stretch coastline near Dudley Point, Australia when he spotted what looked to be a tiger shark approaching.
"I saw it come up to him pretty close and I was getting ready to ring someone as I was sitting there watching it," says Sam.
Adam spotted something too-a large fin moving towards him near that appeared unlike those belonging to a pod of porpoises he'd seen swimming nearby, one that struck him with an "uneasy feeling in the water."
"I didn't really appreciate what was going on at the time," Adam tells the Newcastle Herald. "There was the one fin first up, so I thought it was a porpoise. Then these real porpoises came along."
Sam says that he saw the pod too, moving within feet of of his friend which, the pair is convinced, helped drive the shark away.
"I feel pretty lucky like they protected me. The shark came about three meters away from me. I got pretty close to the porpoises – about a meter and a half," says Adam.