You stare at your reflection in the mirror. It's like the sort of distorting mirror you see in funhouses and as you stare at it your head seems to distort in the image to that of a donkey.
You feel your own face and find that it's still human - for now. Your fingers and toes are getting numb though, and you know they'll soon become hooves...
As you continue to stare at the mirror you see what looks like a round knob at the top and turn it while you still have fingers left. Your face in the mirror turns into that of a pig. Turning it further and you become a rabbit. Well at least you have a choice of what to turn into...