You can draw on your psionic power to boost the power of a trip attack.
Prerequisites
Intelligence 13, Combat Expertise, Improved Trip.
Benefit
While maintaining psionic focus, when you successfully perform a trip combat maneuver, you also deal damage equal to half your level to the creature tripped.
If you expend your psionic focus when you perform a successful trip combat maneuver, you can also throw your target up to 5 feet, +5 feet for every four levels you possess. You can only throw creatures up to one size category larger than you.