As you come to, you realize that the world around you has shifted significantly. You are no longer in the city, you are now currently in what looks like someone's house, looking up on the ceiling. You feel a draft run over your body, signaling that you are naked, but looking at yourself you discover further changes.
You first notice that your entire body is covered in white fur. You run your hand over the fur and feel a pleasant, stimulating sensation run over you. Doing a double-take at your hand, you see it has become a paw, with what look like retractable claws. Lifting one of your legs, you discover a similar change has happened to your foot, and that the bone structure in both your arms and legs has changed.
Pushing yourself up with your elbows (not an easy task when your bones have shifted) you see that your chest is covered with the fur as well, and that there are several small nipples sticking out of it. Looking down at your groin confirms that, for all intents and purposes, you are female.
Feeling a strange sensation at the end of your spine, you look down and see a white-furred tail sticking out of your tail-bone. You soon learn how to control the tail, and bring it within petting distance of one of your paws. Running your paw over your new tail, you feel a strange but pleasant sensation. Looking around, you see a mirror.
You get up, arch your back luxuriously, and then walk over to the mirror. Sitting down in front of it, you see your full self for the first time since you woke up. Your head has changed, with the bottom half of your face pushed out into a muzzle, your nose has turned pink, and two pairs of whiskers grow on either side of it. Your eyes are now yellow and slitted, but still have an unmistakable amount of human intelligence in them. Your ears have moved to the top of your head and have become furry and triangular. You no longer have hair, but your bushy fur coat makes up for that. After this lengthy analysis you come to the conclusion that someone, or something, turned you into a cat.