Not being funny, but what is he going on a propane gas course for ?, that is what you use in heaters.
They are now using propane gas to blow rabbit earths. Kills every thing where it lays, BOOM
That means if i am not mistaken that he is using an Erodinator, this is only classed as use for demolishing empty burrows, not for killing ocupants of used warrens.
That is probably correct and to be quite honest I'm not exactly sure how it works. It must surely demolish some rabbits aswell