Tiger Blooded

 
Prerequisite(s): Ability to Rage, Wildshape or Shifter, one Tiger Claw maneuver.
 
Benefit: While you are in a rage, shifted, or wild shaped into an animal form, you can attempt to knock back 5 feet a creature of your size category or smaller that you hit with a Tiger Claw strike unless it succeeds on a Fortitude save (DC 10+1/2 your character level + your Str modifier). This movement does not provoke attacks of opportunity.
 
Source: Tome of Battle: The Book of Nine Swords