I've been looking for an NTSB report but I couldn't find it.
Two guys come in to land (in a 172 I think) and the pilot puts it down heavily. They hear a glugging sound from the back, only to notice...this gas can they were carrying
has fallen over
Well it's obviously not such a good idea to have gasoline sloshing around your aircraft, so the passenger reaches back to stand it upright again
Trouble is, he has a cigar in his hand
Whoosh!
They had to jam the brakes on and make a run for it
The aircraft was a write off though