Your search of the roof is ultimately fruitless. From what you can see, the smoke just collects on the roof, and seeps out through tiny cracks in the boards. True, given time this would work for the gas as well... only the gas is flowing in much faster than the cracks above would let it flow out.<br/><br/>Sharpspike goes to to the bar and with a grunt he manages to wedge it between the locked door and its frame. With a cry, he throws his weight against it... and bounces off, accomplishing nothing this try.