I'm exhausted. I feel as if I didn't sleep at all last night. Well, yesterday afternoon I waited in line for four hours to buy a ticket for the showing of Michael Jackson's "This Is It" film in the town's theater. Finally admitted into it along with hundreds of shouting fans, I sang, I danced, I swayed, I jumped up and down, I spun around, I screamed "Miiichaaael," I cried. It was dawn before I made it home. . . . Wait a minute---all this was my nightmare from last night.