you had to relearn toswallow,p relearn to chew, relearn to talk. >> i told the doctor in the beginning, i said you do your part, i'll do mine. extensive we did harm his swallowing mechanism. >> good job. again. wait. don't run out. >> we've had this discussssn for a year now. we're just going to keep working. it's like so much, so much better. >> reporter: pat spends hours every day training. >> deep breath. and you know what to do. >> reporter: fighting for every hint of facial expression. >> those muscles from the donor, they do not have any functional input. the nerves are not connected. but if the m mcles are perfectly aligned with pat's face, his muscles will power the new face. >> and smile. >> reporter: doctors say he'll get better at smiling, winking, and talking. pat's already overwhelmed by the transformation. >> oh, i stare -- nobody's scaring the kids. it's very emotional. >> what is that emotion? is that just -- >> i guess that's whaha they call happy tears. >> happy tears. >> i've been upset so much over the last 14 years. because i've had to face it every day. and then n