THIS IS PURE INSANITY.
I actually signed up to Newgrounds simply for this cells-burning-thingy. This thing is pure trash, but quality trash. I'm watching this since the first episode and I was glad when the serie continued. The first minute was incredibely packed with references to surprising stuff (Méliès, Yellow Submarine, the radio news of the linderburg..) and that was great.
But I don't feel this particular episode was superior to the others. It seemed like a one gag thing (and a annoying one), not a complete episode. Theses gerbils and rabbits from previous episodes certainly needs to reappear.
Another thing, the sound is lacking as usual, way more than the graphics that I can accept as they are. This seems to be a quite popular critic of your work so I think it could be quite important to focus on this thing in the future.
Keep the good work!