Jack gets a second or two more of laughter at the sound of Siffleur shifting and the movement of the rack, but then he has to act -

He catches the first rack with telekinesis, pulling it to an abrupt stop in front of himself. It saves him from the first impact, but not the second, when the next rack hits into the one he's holding like a cue ball in pool, slamming it into him. It shakes that rack out of Jack's mental grasp, firing it wildly as he stumbles over, tangled up in the clothes and hangers knocked free of the rack.