Spectacularly.

Approaching Blake from behind, Weiss was only a few steps away before misfortune struck. Failing to notice the puddle of urine in their dark surroundings, the heiress slipped on Yang's piss and fell forward. Arm outstretched with the ice-dust in hand, downward she went towards Blake's rear. Unfortunately for the cat-eared girl, the way in which she was crouching caused her shorts to dip slightly, exposing the top of her butt-crack and leaving a small gap between clothing and buttocks that the vial of Dust just barely managed to slip through. Feeling the slightly chilly vial slide between her butt-cheeks, Blake shot up to a standing position out of sheer reflex. This had the unfortunate consequence of her infamous Bellabooty crushing the container, causing the contents to spill-out and release the frozen energy that was stored within.