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Yes, the one where you put lighter close to nozzle of deodorant, light it up and start to spray out the deodorant. I suppose that this is simillar to how gas stoves work, so it shouldn't explode. Even when I stop pushing on spray button, flame gets closer to deodorant and it feels like its your last moment, flame can't get back into the can and cause a fireshow, becasue there's no air in the can. Worst thing that can happen is nozzle meltig down over time and flame getting bigger but not out of control. Right?

Also, when things can go bad? I know that i shouldn't throw deodorant can into flame, but can it overheat just from being used as a flamethrower and boom?

Danyl Filatov
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No, the flame can't go upstream back into the can and explode what is in the can. This is no different than the flame in your gas stove can't go back up the pipe and explode the whole distribution network.

Fire is a chemical reaction between fuel and oxygen. There can't be fire in the nozzle or in the can because there is no oxygen there.

Olin Lathrop
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