Yes yes, propane is so dangerous in cars. There are about 3mil LPG cars in Poland right now. I dont remember a SINGLE case of a TV report about LPG car blowing up (= non news). I had to google to find out how often that happens and what are the ramifications.
I found people with charred mustaches, first degree hand burns, all from _catastrophic_ gas leak followed by flash explosion inside the cabin. Example video clip: http://motoryzacja.interia.pl/wiadomosci/ciekawostki/news-ta...
Stats: LPG ignition is 8 times _less likely_ than regular gas fire in case of a leak.
so dangerous ...