Reshaping of a classic blowtorch - if you're looking for a level up, try the Rodenator - less immediate flame, way more bang at the end.

The Rodenator is an applicable device that injects a precise mixture of oxygen and propane into the dens of burrowing rodents, and kills them with a concussive force that collapses the rodents' tunnel system as well.

https://en.wikipedia.org/wiki/E_B_Meyer_Inc.

that sounds quite amazing, and it looks like something out of ghostbusters.