Toby Young thought he had it made. He had a prestigious job at Vanity Fair magazine, a press pass that got him in everywhere, and a suave British accent to boot. He was poised to take Manhattan. Then everything went wrong. In this hour of To the Best of Our Knowledge, flops, failures and debacles. Also, jumping the shark: how to pinpoint the exact moment something goes bad, from Seinfeld to Spielberg.