this christmas season -- brian mastre shares one teenager's story. << we're inside the madonna rehabilation hospital in lincoln. this is the christmas party for the pediatric unit. guest besides santa. two months ago - teenager alyssa wacker wasn'n'sure she would ever do this again. super: alyssa wacker, underwood, ia alyssa: "i was very worried about that actually. the surgeon came up to me and she said, "there's a risk with this surgery because we have to move your vocal cords." for her sixteenth birthday, alyssa's parents gave her this s-u-v. before they had made the first car payment, she hit loose gravel on a road near her home in underwood, iowa. the impact broke her neck. here's her x-ray...her spinal cord was also damaged. before the crash - she sang her own songs the guitar had been in alyssa: "my guitar's neck kind of got broke, too." this type of injury carries plenty of uncertainty. alyssa: "i've had some pretty rough days." some people never regain the use of own. super: molly thomas, (quick super) molly thomas, occupational therapist - madonna rehabilitation hospital: "she's m