You can fly directly at a combatant to increase the potentcy of your stunning fist.
Prerequisite: Dex 13, Wis 13, Improved Unarmed Strike, Stunning Fist, base attack bonus +10, Fly speed.
Benefit: You must move in a straight line directly towards the target and then deliver your Stunning Fist in the same round. The DC to overcome your Stunning Fist increases by +1 for every five feet you fly. You may make turns (with successful uses of the Fly skill) before you move towards the target, and you may move afterwards if you have the Flyby Attack feat, but only the last straight line towards the target counts towards the DC bonus. If you are struck by an attack of opportunity while on this straight line, recalculate the DC as if you started from the point you were injured. The target of your attack is denied attacks of opportunity against you while you are flying straight at them.