You are trained in tripping opponents in melee combat and following through with an attack.

Prerequisites: Intelligence 13, Combat Expertise.

Benefit: You do not provoke an attack of opportunity when you try to trip an opponent while you are unarmed. If you trip an opponent in melee combat, you immediately get to make a melee attack against that opponent as if you had not used your attack action for the trip attempt.

Normal: See the normal trip rules.