The Little Life Guard.

Dan wins Anita away from her sweetheart Adrian with his boasts. On the beach Adrian overhears Larry, the lifeguard spinning tales of his derring-do to a group of admiring young ladies and asks for advice. Larry pins some medals on his bathing suit and sends him on his way back to Anita. Dan and Adrian then come to blows over their respective claims of bravery and Anita decides to evaluate them by pretending to be drowning. Adrian tries to save Anita, but both are caught in the undertow and it’s up to Larry to rescue them both.