I had a friend my age that could do what he called a spring up. He would lie on the floor chest down, stretch his arms straight out ahead of him with both hands touching together above his head and his toes pointed out the back. In this position he could spring his body up off the floor arching it between his fingers and toes.

He is the only man that I have ever seen do one of these. He was not particularly strong or even in good shape. They can't be too healthy because he smoked, drank and died of a heart attack at 50 years old.