You can bull rush an opponent straight to the ground.
Benefit(s): Whenever you make a bull rush attack and your combat maneuver check exceeds the target’s CMD by 5 or more, you can attempt to trip the target as part of your bull rush as a free action. This does not provoke an attack of opportunity.
Note If using the optional Stamina Pool rules, the following trick may be used with this feat.
Combat Trick: After succeeding at a bull rush combat maneuver check, you can spend 4 stamina points to attempt to trip the target with Squash Flat regardless of your bull rush combat maneuver check’s result.
Pathfinder Campaign Setting: Inner Sea Gods © 2014, Paizo Publishing, LLC; Authors: Sean K Reynolds, with Amanda Hamon, James Jacobs, John Ling, Mark Moreland, David N. Ross, F. Wesley Schneider, Amber E. Scott, Tork Shaw, James L. Sutter, Jerome Virnich.