You instantly shrink and collapse into your clothes. Buried in the pile you feel yourself to be cold and clammy, your legs seem to be longer, as are your feet, and you feel some sort of webbing between your fingers and toes.
Crawling out of your trouser leg, you discover that you have been transformed into a small frog!
"You know," saws the huge witch, picking up an empty pot "I had frog's legs last year when I was in France investigating gargoyles and werewolves, and looking at you has reminded me how good they tasted.." She slams the pot down over you, but you leap out of the way first. "Come back here!" she says, chasing after you.