Are flamethrowers cool?

I was just thinking the other day, what America needs most is more lethal weapons in the hands of nutters.

Flamethrowers for everyone would be a really good start.
 
I always wondered, what stops the flame from one of those hand held torches you can get at any DIY store from getting sucked into the bottle and exploding?

I mean, the head is just a pipe with a valve, so surely once the pressure in the can drops too far theres the potential for the flame to travel back down the pipe into the can and.... boom?
 
I always wondered, what stops the flame from one of those hand held torches you can get at any DIY store from getting sucked into the bottle and exploding?

I mean, the head is just a pipe with a valve, so surely once the pressure in the can drops too far theres the potential for the flame to travel back down the pipe into the can and.... boom?

There's no oxygen in the can...
 
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