Well I was reading the anarchist cookbook a while back and there was instructions on how to make your muffler into a flame thrower. Drill a hole into your exhaust pipe. Screw a spark plug into the hole. Wire the spark plug to the battery. Connect it to a switch, when flicked on, the spark plug will spark, setting your fumes into flames. Never tried it though... but my friend is gettinga loaner car from Toyota... 
