The most unnatural cases are when you can make a running jump forward and land where you started (reversing your direction mid-jump) or jumping around corners. Normally humans (nor other natural beings without wings) have no control in such situations, instead, they kick off or swing from some fixtures to accomplish something similar.

This is usually done to counter the lack of precise control before launching oneself into the air in games.

Does not include ability to turn, spin, etc. that don't affect where you're going with the jump.