You collapse in agony, fabric finally rents releasing your new tail and relieving some of the pain. Your hands and feet deform into claws. You shred your remaining clothing, as your muscles swell and you begin to grow incredibly huge.
Growing pains. Bones grow to three times their former mass in seconds. Muscles and bones rip and break, then reknit into a new shape. Your whole being is racked with pain. Your jaw and skull are swelling, the weight makes your brain hurt. Talk about TMJ, what you experience makes TMJ look like a splinter in the finger as compared to being hoist on a pike. The agony is finally too much, you scream. Your scream grows louder as you grow larger. Needles prick all over your body as fine black, white and orange hairs spread over your huge naked form. Your scream becomes are roar.
You realize that you have transformed into a tiger. A very hungry tiger.