You crawl for what seems an hour, the cold steel of the vent drawing the warmth from your body. Finally, you reach a small grate, just large enough for you to fit through.
You try shaking the metal bars, and the grate dislodges. Wiggling through the hole, you come out into a small room. A desk is on one side, with nothing but a telephone on it. A small camera is in the top left hand corner of the room, but it was pointed at the wooden door.
Suddenly, you hear footsteps. You hide under the desk, hoping the whoever is out there does not enter. The footsteps start to fade, and you relax
Suddenly, the phone degins to ring. The camera seems to switch off, and the door swings open.