Actually, back in the day, something like that made perfect sense for an Iowa farmer to use. Esp in dealing with the weeds that were in the culvert that ran along the road in front of the farm. A lot of farmers did burn the weeds to control them. Given the depth of the culvert it was the only way to easily do so.Of course, these days something like this wouldn't be considered environmentally correct as it would create smoke & CO2.
It would be pretty awesome to have a flamethrower.
Especially if it was 1 designed by Q (if you get the refernce).