Will Ferrell Prank Turns Into Screaming Match With John McEnroeBefore he turned his cinéma vérité antics into a big-money business called Funny or Die, Will Ferrell apparently liked to practice a little guerilla theater on his neighbors at CNBC, as seen in this funny-and-disturbing-all-at-once video. Shot probably in 2004 — the Kerry/Gephardt joke is a dead giveaway — the vid sees Ferrell crashing Power Lunch, where Sue Herera is all guffaws but Bill Griffeth and his offstage help (UPDATE: John McEnroe!) are having none of it. For evidence that this sort of mischief eventually pays, see Portfolio's January piece on how Ferrell has raised $15 million for his business.