Nightmare #9. On the set of MTV’s “Unplugged.” I’m a session player. Keytar. We’re all eagerly awaiting the arrival of Dave. It’s his big comeback…he’s lost a lot of weight, quit sniffing glue, learned how to write cursive. The crowd, at first enthusiastic and friendly, is now restless and combative. A beautiful vase of red carnations whizzes by my head. Where the bleep is Dave? Is MTV editing my thoughts? Once he gets here, everything will be better. The crowd, now zombies and drunk gypsies, attacks us. We’re being eaten. My fingers! My toes! Gone. Dave never shows.