Disorienting Maneuver

Your erratic movements disorient your opponent.

Prerequisite: Dodge, Acrobatics 5 ranks.

Benefit: If you successfully use Acrobatics to tumble through an opponent’s space, you gain a +2 circumstance bonus on attack rolls against that opponent until the start of your next turn. If you choose to make a trip attempt against that opponent, you gain a +4 circumstance bonus on your combat maneuver check. This bonus on trip also lasts until the start of your next turn.

Source: Ultimate Combat