A writer in Boise, Idaho takes some editorial license.
This was allegedly sent to the producers of the FunFunFun Fest in Austin, where Slayer played earlier this year, and dear god we hope it's real. Because as great as Slayer is, knowing that they order "hand sanitizer" AND "hand satanizer" makes them ten times as great.
What you're seeing in the last panel is the brain releasing dopamine, kittens, and the mellow hits of Phil Collins into the body as a last-ditch attempt to numb the crushing pain of music festivals. Or maybe it was just awesome and everything else was actually just a minor inconvenience.