Chord of Distraction( Complete Scoundrel, p. 75)
You can channel the power of your bardic music to make a sudden sound or gesture that momentarily distracts an opponent.
Perform 9 ranks, Bardic music.,
As an immediate action, you can expend three daily uses of your bardic music ability to distract an opponent. The target must be within 30 feet of you and able to hear or see you. Make a Perform check, opposed by the target's Sense Motive check (modified as if you were using Bluff to feint in combat). If you succeed, that opponent is rendered flat-footed against an ally of your choice. The effect lasts until that opponent is attacked or until the start of your next turn, whichever comes first.