It's amusing to me that the second thing she had him do was sing in front of a crowd. I essentially did the same thing, using karaoke to shed social anxiety. While I certainly wasn't at the level of this guy to begin with, I can guarantee you the first time I ever did karaoke at a bar I was shaking pretty violently, and I had to be extremely drunk to even consider it. Now? I can go up completely sober and really not think twice about it, and the social anxiety I used to feel in most social situations very rarely rears it's head.