"Suomy, i don't agree. In the third case you're supporting less than the body weight. If you're supporting more, the body would have a net upward force, and actually leave the floor!!"
The speed of lowering slows as your path changes over from fall to travel. To slow your body weight's downward motion, you have to apply a force against the floor greater than your body weight. Many people are not able to do this well enough to cleanly convert the fall from their peak of rise into travel, and instead are still falling as they arrive on the first step of the next figure. The man's step back into the spin turn is notorious, since it's easy to get very high in the first three of the natural.