The lock clicks open after a while. The bobby pin breaks from the strain thereafter. The stairs beyond lead down. This building's subbasement is dimly-lit, due to half its light fixtures being burned out. Electrical panels whine, massive HVAC motors vibrate, and water pipes rumble all around you. The smells of dust and various machine oils hang heavy in the air. A few shelves of tools huddle against one wall, at the extreme edge of the lit floor.