|benefit=Anytime the creature makes a successful critical hit with a normal attack, it may choose to make the attack an awesome blow. Alternatively, it may choose to subtract 2 from its attack roll on an attack beforehand to automatically make that attack an awesome blow without requiring a critical hit.  If the creature hits a corporeal opponent weighing no more than twice his maximum load with an awesome blow, that opponent must succeed on a [[SRD:Reflex|Reflex]] save (DC = 5 10 + damage dealt) or be knocked flying 10 feet for every 5 damage dealt, in a direction of the attacking creature's choice, and fall prone at the end of its movement. The attacking creature can only push the opponent in a straight line, and the opponent can't move closer to the attacking creature than the square it started in. If an obstacle prevents the completion of the opponent's move, the opponent and the obstacle each take 1d6 points of damage per 5 feet left in the opponent's movement, and the opponent stops in the space adjacent to the obstacle.