Quote Originally Posted by bruce.desertrat View Post
Guessing the usual melange of hydrocarbons that are in grease pits...
What I am thinking is, since this was obviously a staged event for click bait the guy, probably opened an LP tank down there for a while ither that o r a nat. gas line.
Generally greases and oils would not produce enough vapors to instantly combust from a a source as small as a fire cracker,