I would think that if you were to hit a person in mid leap, it should do additional damage, because while you are in the air, you are unable to dodge or otherwise avoid an attack.

It's like in basketball, if you can fake a defender into jumping prematurely, you can drive past him while he's off his feet because until he hits the ground, he cannot react to what you are doing.

If you can get a leaping crushing blow against someone unobserved, then maybe you should do more damage, but otherwise, it ought be the fastest way possible to get yourself impaled on the end of some other guys blade.

To the everlasting glory of the infantry...

Owain ab Arawn
KGB Supreme Knight
King's High Council