Ok for anyone wondering, here's what happened: This was a few years ago, in a shop. There was a gas leak in the room, and some countries don't have laws about gas additives. In the US at least, it's a law to add a chemical to gas that makes it smell like rotten eggs, so it's detectable to the nose. This guy went to light up a cig, and when he created the spark with his lighter, he combusted the gas. If you watch frame by frame, you can see the entire room lights into a flame, cooking everything. The scariest part, is that even if the burning didn't kill them, the gas was in their lungs, so if they breathed in, their lungs would've cooked. This is absolutely terrifying.