Stomp

Stomp [General] You impale, smash or cut down anyone foolish enough to be caught at your feet. Prerequisite: BAB +1 Benefit: At the start of your turn, you gain a free attack against an opponent that is prone in a square you threaten. This attack is considered an attack of opportunity and does not otherwise count against your actions for the turn. You may only attack a single foe in this fashion; if you threaten multiple prone opponents, you must choose which to attack. Despite the name of the feat, you may use any weapon or unarmed attack to make this attack. Special: A fighter may select Stomp as one of his fighter bonus feats.