You can perform a devastating bull rush that leaves your foe sprawled at your feet.
Prerequisites
Strength 13, base attack bonus +4, Power Attack, Improved Bull Rush.
Benefit
When you successfully push an opponent back with a bull rush attempt, you can cause them to be knocked down at any point during the movement. (This does not count as a trip attempt.)
After knocking down your opponent, you may continue your movement to the maximum distance determined by the bull rush attempt and may freely pass through the knocked down opponent’s space without provoking an attack of opportunity as if the opponent wasn’t there.