"I gave him a nice little jab," McQuillen told CBS 8.
He managed to swim back to safety without any further attacks. He made it back in time to warn friends, knowing that he was bleeding from his foot and had some of the shark's blood on his spear. "I saw blood around me," he wrote on YouTube, "and wasn't sure where it was from, so I swam as fast as I could back to shore."
At that point, he didn't realize that the bite that tore off one of his flippers had made it through to his foot. He was fortunate, though. He only broke two toes from the bite and didn't suffer any other injuries. That could have gone worse.