The gas had started to clear and the fog became less and less intense in their little cube. A beeping noise started. It was slow, like a heartbeat at first; but it Elliot and Tonks listened it would get faster and faster with each passing minute until it was a solid tone and the pumps started again.
This time the smoke came in at an exponential rate to the way it had before. Hit that button, kiddos; though, don't strain too much, you wouldn't want to use up all your precious air.
The pumps would not be stopping, unfortunately. The smoke would roll in, the air would be contaminated, and it would only be a matter of time before Tonks and Elliot would suffocate. Sorry, ladies, there's no winner this go 'round.