They did move somewhat, jostled, but that was why he kept a good grip on her. Her force-push helped, as they skid a few feet, barely managing to keep his feet against the floor. Cold, shockingly so and it made him almost forget where she'd pointed.

Almost--and he summoned every ounce of willpower he had. Powering up fast, ki around them pushing back against the water, not quite-crackling against it. Trying to move closer to that spot, half-drifting with the flow, half not-quite-flying. Moving one arm to put a hand on the wall--summoning energy, more power, trying to blast the weak-spot open. They had seconds, and if this didn't work they'd be swept away down to the dead-end.