Hammer hands
Fighter Utility
You throw your weight into each attack, striking with such force that you drive your enemy before you.
Personal
Effect: You assume the hammer hands stance. Until the stance ends, whenever you hit an enemy with a melee basic attack using a weapon, you can use a free action to push that enemy 1 square and then shift the same distance to a square adjacent to the enemy.
Hammer hands is an at-will stance available to knights at 1st level.