Combat Stability

Type: Combat Form
Source: Player's Handbook II

When you maintain your combat focus, you become difficult to dislodge. Your muscles lock into an unyielding position, granting you superior ability to resist trip attacks, bull rushes, disarms, and similar effects.

Prerequisite: Wis 13, Combat Focus, base attack bonus +3.
Benefit: You gain a +4 bonus on checks or rolls to resist bull rush, disarm, grapple, overrun, and trip attempts made against you.
If you have three or more combat form feats, the bonus granted by this feat increases to +8.
Special: A fighter can select Combat Stability as one of his fighter bonus feats.