Your bull rush can knock a foe across the room.
Prerequisites: BAB +1, Power Attack (Feat), Heavy Armor
Unlocks: Demolisher (Feat)
Benefit: Up to once per round, while wearing heavy armor with which you are proficient, if you successfully Bull Rush a foe, you can push that foe back an additional 5 feet for every 5 full points of armor bonus (including any enhancement bonus to your armor) plus shield bonus (including any enhancement bonus to your shield) you have (add together and then drop any fractions). If you Bull Rush a foe into another foe, this bonus applies to all affected foes.