Escape From Hell Asylum

you race headlong down a narrow corridor lined with identical cells marked M1-M12 that seems to go on for ever. You catch a glimpse of a shape moving in your periphery but the light is too dim to see. Low moans and muttering can be heard at either side of you. At the end of the corridor is a fire escape door that looks about rusted shut and to your left is a sturdy looking metal door with the words `special treatment room` engraved on it.