Pushing Assault (Feat)
A strike made with a two-handed weapon can push a similar sized opponent backward.
Prerequisites: BAB +1, Str 15, Power Attack (Feat)
Benefit: When you hit a creature your size or smaller with a two-handed weapon attack modified by Power Attack (Feat), you can choose to push the target 5 feet directly away from you instead of dealing the extra damage from Power Attack. If you score a critical hit, you can instead push the target 10 feet directly away from you.
Note that this is forced movement and does NOT require a CMB vs CMD roll.
This movement does not provoke attacks of opportunities, and the target may elect to fall Prone voluntarily to end the movement at any point. You choose which effect to apply after the attack roll has been made, but before the damage is rolled.