Ok I will admit rewatching just to see it. It looked like some random seaweed had crept in there and was waving for help. I have to admit surprise that a gym bunny/exotic dancer like him isn’t waxed to within an inch of his life.
Apparently the scene was filmed at Brighton beach (in Oz). Can’t help think about how different it would be in the UK. So many stones on Brighton beach, and they would probably have had to wear kagoules. At least we’d have been spared the armpit hair!