Knockdown Power

 
Prerequisite(s): None
 
Benefit: To use this feat, you must expend your psionic focus. Knockdown power knocks any creature caught in its area prone if the target fails its saving throw to avoid any or all of the damage of the power. It can only be applied to powers that allow a reflex save and affect an area. Creatures with Evasion are knocked prone if they fail their reflex save (Those with Improved Evasion are not affected). Flying creatures affected that fail their save drop 10'. Using this feat increases the power point cost by 2. The power's total cost cannot exceed your manifester level.
 
Source: Complete Psionic