While reading that story, I had visuals of a completely unscathed spider crawling out past the wreckage of the bathroom door, with the guy inside writhing around in flames as the mushroom cloud of fire explodes out the window.

Reminds me of a story a while back where some idiot set off dozens of bug bombs. (cans of fogging spray, the kind you set and run away from) The 20 plus cans of bug killer are hissing away, while a forgotten pilot light in a water heater finally was reached by the ever-expanding cloud of explosive insecticide. The house was knocked off its foundation, all its windows and doors were explosively removed, neighboring buildings lost windows, etc. What was left didn't burn because the explosion was too brief, but cockroaches were running out of every crack and seam.