Another interesting story from the U.K.:
Mr Furze, 30, displayed his modified his scooter, with an anti-tailgating flame thrower operated by the flick of switch, in the press earlier this week.
But Lincolnshire Police spotted the pictures of Mr Furze allegedly riding his scooter on a public highway – and arrested him on Thursday.
He was held on suspicion of possessing an object converted into a firearm, and was released on unconditional police bail without charge until May 6 pending further police investigation.
Possession of a firearm carries a maximum prison sentence of five to seven years at Crown Court.
Source – HERE
Although awesome, it definitely sounds like there is the potential for something very bad to happen with a setup like that; especially using it on public roads in traffic.
From what I can gather, in the U.S. flamethrowers have the potential to be classified by the ATF as Destructive Devices. I guess depending the intended use, and on how badly they want to throw the book at someone.