Beer is nice, but you like what this woman is offering, even if the offer is only implied. You walk inside, smiling. She smiles to and locks the door behind you. You see her smile broaden as she sits on a couch and pats the spot next to her, which you take.
"So," she says putting her hand on your knee. "You come into my carnival. Curse my daughter to be a plastic horse on my favorite ride, then you destroy my favorite ride and claim that you're a hero for rescuing her, when you're the one who put her in danger in the first place." she says. Then she moves her face so that her nose is less then in inch away from yours.
"After all that, you come in to a married woman's trailer hoping for a cheap fling?" she asks.
"I should be going." you abruptly decide, but your body won't respond. She sigh and leans back.
"You should be, but you won't be." she says as she kisses you on the forehead. You see the walls suddenly stretch out all around you. The witch before you suddenly towers above you. You stand up to run, but fall forward, tripping over your own feet as they grow in size and your legs reshape. White fur spread all across your body and your arms shrink. You see your face push away from your body and feel a pair of whiskers grow from your face. The last change you feel is a snake-like tail grow in behind you.
"Why a rat, you ask?" The sorceress asks rhetorically. "It's so no one can rescue you. I've got half a dozen rats in my lab that I use for experimental purposes." She picks you up and drops you in a cage in a secret room in her trailer. "Oh, one last step. A formality with all my rats, really." She narrows her eyes and mutters something. At first you notice no change, but then you realize that you've lost control over your body. It moves around the cage as a regular rat would.
"There. Now you still have your human mind, so that you can suffer, but your body will act like a rat so you can't signal any potential rescuers. I'm very proud of that spell. See you in the morning, I've lots of tests." She says and turns out the lights.
You're not sure how long you spend hoping for a rescue, but you do know that it never comes.