A few years ago I was in a "lab" identification class that was tought by CHP personal. The outstanding class was lead by a narc Lt. that had been in the show since the start of the meth epidemic on the west coast. She personaly was disabled (respitory damage) from busting cooking operations with out using the respitory equipment commonplace today. I guess getting blown up should be a huge consideration, but I always personaly worried about breathing the toxic fumes and searing my lung tissue the most. The interesting part to this is that we haven't had gunplay with the labs yet, it has just been the users? As mentioned before a functional "lab" can be transported in a vehicle which makes it very possible for anyone to stumble upon an active operation forcing them to take drastic measures in the interest of personal safety.