I’ve never seen the movie the myth came from, but do people really think a muzzle flash is going to set off a room of methane? And even if it did, you singe your eyebrows, not blow up the room. Anyone whose ever messed up lighting a pilot light knows this.
Underwater car is one of my favorite myths, so I enjoyed the revisit. But, given the circumstances, I don’t know why breaking a window wasn’t an option, especially since the windshield cracked so badly on impact. I’d be kicking that thing out ASAP to get out of the car.