As you drink the water, you start to feel dizzy and lightheaded. Shaking your head a few times to clear it, you shrug to yourself and head back to your house, to get ready for your school trip.
You get back home without incident and say hello to your parents. You go into your room and grab your bag, then rush out the door and off to the waiting school bus. Climbing on, you sit back and enjoy the ride to the supposedly haunted mansion.
When you get to the mansion, your class goes to the front desk to wait for a tour guide. Suddenly, your stomach cramps up, and you ask the teacher if you can use the restroom. The teacher says you can, so you run off down the hall. Reaching a room you think is the restroom, you slam open the door and go inside.
You realize as you go in that this isn't the restroom at all. It looks more like someone's bedroom. Wondering how you're going to explain this to the teacher, you are suddenly hit by another spasm, which actually flings you onto the bed. You curl up under the sheets, scared of what's happening to you.
Suddenly, you feel like you're shrinking. Looking at yourself, you see that indeed, your clothes are looking more and more like bedsheets on your dimunitive frame. Pulling off the useless garments, you stash them under the bed, hoping that you can get the teacher to leave before you come out from under the covers if you do get spotted.
Suddenly, shivers run up and down your spine. Looking at your naked body, you see your bone structure start slimming down. Soon, you're a lot skinner than you used to be. But that's not the last of it.
A feeling of warmth washes over you. Looking at yourself, you see silky white fur blossom all over your body, covering you from head to toe. Your hair has now been replaced by fur as well, albeit slightly longer than the fur on the rest of your body. You start stroking the fur out of reflex, just wanting to see what it feels like. Suddenly you do a double take as your hand passes through your field of vision.
The bones that make up your hand appear to be moving. As you watch, your hands (and feet judging by the sensations down there) reshape and remodel themselves into paws, with black claws replacing your fingernails and toenails. Black pads grow on your palms and on the bottoms of your feet. You try to move your fingers, and find that you have lost most of your fine motor skills.
Suddenly, you are jolted upright by a pressure on your bottom. Sitting up in the bed, you turn around just in time to see a white furred fox tail shoot out of the base of your spine. Curling the tail around, you place it in your lap and start stroking it, suddenly feeling the tingle as the rush of endorphins spreads from your tail to your brain.
A sudden chill enters the room, noticable to you even through your thick coat of fur. Whirling around, you see a silvery white person sitting next to you. He holds two fingers to his lips in a "Shhh" gesture, and points to a mirror he's holding. Getting the picture, you stare at your furry face in the mirror.
You watch as your ears grow pointy and move to the top of your head, and as your nose and mouth push out into a vulpine muzzle. You see as well as feel whiskers shoot out from either side of your muzzle. You watch in shock as your eyes turn from their usual brown to an icy blue.
You then feel a pressure on your back, and you are forced to all fours. Curling up into a ball, you look up at the ghost and say "Well?" Shocked to realize that you can still speak, you clap your paws over your muzzle, scared of losing this gift. "Well what?" Asks the ghost. "Well, what am I going to do?" you ask. "I mean, I'm a fox. Granted I can still talk, but I'm an animal in all other aspects. If my classmates find me they'll call animal control." "That is a problem." Says the ghost. "And I think I have a solution. Why don't you stay with me? I can provide food to you through my heirs and accounts, and you'll live in decent comfort." "Well" you say "I don't see why not." "Perfect!" Says the ghost. "Let me make the arrangements." You watch as he floats away, then burrow under the covers so your class won't find you, lay your head on your paws, and go to sleep.