You roll a small number on the dice, and suddenly feel something strange. You suddenly start to fall torwards the ground, then with alarm you realize you're shrinking!
In a moment, you are buried beneath your own clothing, and try to crawl out desperately.
Naked, and still chaniging, you manage to make it out, as your brand new wormlike tail slinks out behind you. White fur reaches to cover your body, and your ears become a lot more round.
In just a few moments, you're a mouse.