Originally Posted by listopencil
Yeah, that's where Mythbusters was trying to show that the stunt from Casino Royale wouldn't work in real life. That you aren't going to shoot the pistol that Bond used and pierce through a propane tank. A high powered rifle round will though. A full tank will blow out enough propane to flood a room when pierced. I have no idea where the tank was within the structure, or how full it was, or if the guy was even telling the truth when he said that there was one in there. But if the tank was in there, and it was reasonably full, it could have been pierced by weapons that were on scene. There are a number of ways that the resultant cloud of propane could have been ignited at that point. If you "turn your brain on and think about it" as you suggested, it's silly to just assume that the authorities torched Dorner based on one comment made by a passing cop.
Did you watch the video? They fired a high-powered rifle round at it. And a tracer round. The tracer round is going to be more than hot enough to ignite the propane (I forgot they did that before I edited it) but like I said, the fuel/air mixture has to be incredibly precise to ignite. All the high-powered rounds did was puncture the tank and shoot gas into open air, which is going to be far too diluted to ignite at that point.
A bullet is not
going to ignite a propane tank. The fuel/air mixture will be way off as soon as the tank is punctured and the vapor escapes into open air. It really would be a 1 in a million occurance.
And if you're giving odds that long, the odds of the LAPD setting the ****er ablaze after saying "Hey, lets burn this building down" are FAR greater than the odds of a bullet igniting the propane or even the a flash/bang grenade lighting the propane fumes.
What probably happened is that the tear gas cannister ignited an inert substance like a couch. What almost, 100% did NOT happen was the propane tank was ignited ignited by stray gunfire.