How To Outstupid The Best In Safety Devices (LPG)

I've seen something like this before. Some teens in our town heard you could get high by sniffing propane. Someone decided to have a cigarette and ... boom! Strangest wreck I've ever seen. The windows were blown out. The car looked like it had been in a rollover, but the roof was pushed up about a foot. More evidence that cigarettes are bad for your health.