Originally Posted by
carleton
Here's an example:
Notice how clearing the box is more about him pulling is feet up as opposed to him launching himself off of the ground. Notice that his hips only moved like 2 feet off the ground
The hips may be the center of mass while standing, but by raising his knees higher he is raising his center of mass relative to his hips. Which requires more power. It's the height reached by the center of mass which is indicative of power of the jump.