You turn on the taps, but instead of water, a glowing greenish goo leaks out. As you turn to leave the room, the door shuts and locks! Turning back, you see malignant ghosts pouring out of the faucet. They start circling you, shrieking and howling in ill will. They shout:
You should know better than to enter dark rooms without light! Now we'll teach you a lesson!
They swirl around you closer and closer, and one-by-one enter your mouth, filling your throat and lungs with thick ectoplasmic goo.
And the last thing you see are glowing bright ghosts, in all directions.