Okay I wanted to type a little Harry Potter esque thing, where it decribes someone turning into a horse animagus in mid run, almost like a Twilight thing, where Jacob runs and explodes into a were-wolf, but not as dumb, and not as lacking in shirts. I'm posting it here so no one can find it on my computer.
As the woman ran, her arms swiftly enlongated into knobby posts, and as they touched the ground, hooves formed, their clopping sounding throughout the hall. Her torso began to bubble as her neck and face began to stretch outwards. Her legs stretched out towards the floor, and in completeing her transformation, long chestut hair sprouted from her poll to her withers, and from her newly formed dock. The whites of the new horses eyes were rolling, suprised and slightly frightened, as this transformation was in fact the woman's first.