SLFStuckInTheBack:
Matches are not allowed in the hold for a very good reason. Can you imagine that 400 bags (for example) could move around and the friction could just be applied to a bag at the bottom of the pile?
I can remember when I was a captain in Transport Command that one of our VC-10s had a hold fire (if my memory serves me right) on the descent into Akrotiri in Cyprus. They were very lucky to get the aircraft and its contents on to the ground without any fatalities.
The cause was the rubbing together of matches in a soldier's luggage.