Awe-Inspiring Smash (Combat, Performance)Source Inner Sea Combat pg. 12 (Amazon)
Your fury in combat translates into crowd-pleasing displays.
Prerequisites: Str 15, Power Attack, base attack bonus +3.
Benefit: You can apply your Strength modifier instead of your Charisma modifier to performance combat checks.
In addition, when you spend a swift action to attempt a performance combat check that was triggered by a successful bull rush or sunder combat maneuver check, you gain a +2 bonus on the performance combat check. For every 5 points by which your attack exceeded your opponent’s CMD, this bonus increases by 2.Source Weapon Master's Handbook pg. 24 (Amazon)
After successfully performing a bull rush or sunder combat maneuver, you can spend up to 5 stamina points to increase the bonus on performance combat checks that you gain from Awe-Inspiring Smash by 1 per stamina point spent.