Giantslaying Team (Combat, Teamwork)Source Inner Sea Races pg. 206
When a giant attempts to hit your ally, that giant unwittingly reveals an opening in her defenses.
Prerequisites: Dex 13, Dodge, Mobility, base attack bonus +4, defensive training racial trait.
Benefit: Whenever a foe with the giant subtype you threaten misses with an attack of opportunity against an ally with this feat, you can make a melee attack against that giant as an immediate action.