Improved Overrun

Improved Overrun (General)
You barrel over your opponents with ease.
Prerequisite: Power Attack.
Benefit: When you attempt to overrun an opponent, the target may not choose to avoid you. You also gain a +4 bonus on your Strength check to knock down your opponent.
Normal: Without this feat, the target of an overrun can choose to avoid you or block you.

Improved Overrun

Glimpses of Hyboria Elfbane