The thing about Post Traumatic Stress Disorder is that before you can get to the "post" part, you are going to have to endure the trauma part. And there is trauma aplenty in the first half of the revival of the rock opera The Who's Tommy, opening tonight at the Nederlander Theatre. So much so that, at the performance I attended, a child's voice from a few rows behind me rang out: "I don't like this. I want to get out…
