I actually know someone who used a lighter to warm up the end of a pipe to put it onto their fuel tap, in pushing it on shook a little bit of fuel out of the valve, then proceeded to warm up the other end to push it onto the carb, yep you've guessed it . .
Then the first liquid to hand to put out the burning pipe was a can of two stroke oil,
Yep he did
, just the thought makes me cringe, lucky enough I think the flame was by then just licking at the end of the tube and the oil smuthered it, but still ...