That was ghastly.
I’m guessing it was propane and oxygen blown under pressure into the hole.
Was it my imagination, or were some ballistic gophers actually visible in a few of those scenes?
I dunno, I kind of enjoyed it. Yes it was a propane and oxy mix that gets blown into the tunnel for a few minutes then shut off, and the Rodenator has a sparking mechanism at the end of the probe/sealer that ignites the mixture.
As for the ballistic gophers, I’m not certain. I’ll have to re-watch the vid later to see if I can make out a few.
Spectacular results, though. :)