Main Question or Discussion Point
It is said that jumping with the Fosbury Flop technique, one's center of mass stays significantly under the bar. What if, instead of the bar, one tryed to jump over a wall? It looks as though there's no difference between the bar and the wall, but the wall is a potential barrier for the center of mass and so the jump should be unsuccessful. What's the difference between the two cases and why is the Fosbury Flop tehcnique successful?