Many years ago I was in the Orthopaedic Ward of the hospital and there was a guy in the next bed with a broken ankle. He took great delight in telling people how he did it when jumping off a whales back. Then he would tell them how. A whale carcase was washed up on the beach and he did the "me man who kills to feed tribe" act by climbing up on the beast and pounding his chest. Then he jumped off.