ok new answer
i walk out my room and start a grease fire in a pan, as the kitchen is right outside my room. i simply wait there heating up the oil, when the door opens i splash the oil and maybe even fire if i get enough time on the perp. i also then yeet the pan.
europoor victory, thanks better call saul you were a good show
this is assuming you have enough time to heat oil to a temperature where it's able to catch fire, and also assuming the dude isn't on drugs or something and won't simply get angry and blast you. otherwise good strategy, would allow you to get some hits off with the pan
also I could tell you right now: it doesnt take a chemist to make a bootleg bomb if you have lighter refill tubes. I also have a lighter in my pocket right now and a bottle of spray deodorant next to me. go nuts, who needs a glock.
flamethrowers rely on spraying flaming liquids that go far while still on fire. by using a flammable aerosol and a lighter you're basically just making a bigger flame, and your opponent isn't a wild dog so they'll just pop you a few times in the arm and carry on with whatever they want to do with you. also, chemists know how to make and detonate bombs safely, so you'll most likely just make a dud or start a fire in your house and nothing else