Methane: The rush comes back to bite us

So we finished it then we had to put a hole near the bottom to put in a out pipe so of cause it would only take a chisel and hammer.... but no, we moved up to a drill to weaken it and slowly very, very slowly we started getting somewhere. The conditions were terrible dust, noise & vibrations and all this in a hole less than a cubic metre quite a tight fit, at this stage i was really pissed off, we thought we were never going to get there.