Um, you never need a reason to break out a flame thrower.
Nah, mate. You don't need a reason for it.
BBQ? For the whole family? Why wait? Throw all the food into a pile and
burn quick-fry it.
Got a spider in your house? Burn down the block.
Just to be sure. You may never know. The fucker may have escaped. And created babies. :V
Annoying neighbor dog? Burn down the neighbor's house, keep the dog.
Annoying girlfriend? Fry her parents. Fry her parents some sandwiches. They love it when you appease their parents.
Aching back? Use the flamethrower as a coolass and flammable walking stick.