"Excellent.", he says with an evil grin. "Now I'm going to have to strap you down - for safety procautions of course." You begin to wonder if this is such a good idea after all.
"Now I must warn you, this may sting a bit." You feel a sharp, stabbing pain as the doctor injects you with some sort of toxin. The pain is nearly unbearable, and you soon black out...
You wake up in what almost looked like a jail cell.
"Ah, you've awaken, good. The changes should begin any minute now."
You begin feeling dizzy, and your vision blurs. "What have you done to me?!?", you yell, confused and angry. "Look, I dont know who you are, but when I get out of here, I'm gonna - ARRRRRRRGH!"
Your heart feels like its about to explode. You feel hair growing out of your body everywhere. Fangs peak out of your dried lips. Your nails grow and thicken to form claws. Your shirt and pants begin to rip from you body's growth. But then, the changes just stop, as if they'd been paused.
"Welcome to stage 1 of my little experiment. I believe you'll find the other stages will be a little more painful."
I can't belive what's happening, and you certainly don't want to. But then you see that the doctor has left the room. With your new strength, you could try to break out of your cage.