Feint

You can use your standard action to feint by attempting a Bluff check. The DC of this check is equal to either 10 + your opponent’s Sense Motive total skill bonus or 15 + 1-1/2 × the opponent’s CR, whichever is greater. You can’t feint against a creature that lacks an Intelligence score, and you cannot take 10 or take 20 (see page 133 in Chapter 5) on a Bluff check to feint. When you successfully feint, you treat your opponent as flat-footed for your next attack against him before the end of your next turn.