You don't have time to wade to the drainage pipe - you need to get out of the water immediately!

You grip the largest rock in front of you and haul yourself on top of it. Inky black water runs off your clothes in thick rivulets, splashing back into the moat around you. You have no time to waste! You stagger to your feet, and begin crossing the rocks with renewed haste. You move just as the tendrils swipe at the place you were standing, barely missing you!

But as you spring across the next couple of stones, it's clear that your victory was short-lived. The rocks are much harder to navigate at this speed; your foot glances off the next rock, sending your legs out from under you and throwing you backwards. You flail out at nothing, unable to stop your fall as you splash back into the inky depths.

You can see the sun faintly through the water, just beyond the surface. But as you begin sitting up to breach the surface, a slick tendril slides around your neck...