[Number6]

Reminds me somewhat of an old Tom and Jerry bit; the cat mixes up a bunch of poisons to kill the mouse, only it backfires and the mouse gets buff and super-strong.
It wears off and the mouse tries to mix up another batch, only for the cat to snatch it away. The cat drinks it and initially gets bigger and meaner-looking but then *pop pop fizzle* shrinks until he's no bigger than the mouse. The mouse knocks him on his back and *pop pop fizzle* the cat shrinks to half his size. One last smack from the mouse and the cat's turned bug-size, and the mouse chases him offscreen with a swatter or some such.

I swear, I felt so bad for that cat sometimes...