Tumble
Effect:
You gain a +5 bonus to disengage checks. In addition, while you are moving, if an enemy moves to intercept you, you can make one disengage roll per intercepting enemy as a free action to avoid that enemy, but you must stop the first time you fail any of those disengage checks.
Adventurer Feat:
You ignore the penalty for disengaging from more than one enemy at a time.
Champion Feat:
One battle per day as a free action, you can declare that you're a tumbling fool and automatically succeed on your first disengage check each turn.
Epic Feat:
Whenever you take critical hit damage, roll a hard save (16+). If you succeed, you somehow tumbled out of the way of whatever was about to hit you, and instead only take damage equal to the attacker's level.