Right now, hordes of fevered scientists around the globe are pulling all-nighter after desperate all-nighter. They haven't changed their clothes for weeks. The walls of their laboratories are speckled with fist-sized craters, each marking a different failure. Their marriages are in ruin, their children strangers to them. And it's all because Back to the Future: Part II was set less than two years from now. "Damn it, Bob," one jaundiced, coffee-stained boffin is yelling at his semi-comatose colleague. "These people were promised hoverboards. If we don't have a working hoverboard in production by Christmas, there will be riots. These animals...