From someone who should no better about gas etc,( I play steam) I was filling my small gas lighter the type you use for lighting the gas etc, I use one for heat shrink and when filling with a Ronson type can it spits everywhere, so if you do it over a bench it lays there for a bit , so if you then try to shrink tome wires laying on it WHOOOSH no hair on hands arms etc, and a trip to the bathroom , (I know how jos Verstapin the F1 driver felt) any way it wakes you up..
Peter