11. All of those blank AOL discs are really incubators for advanced nanotechnology that eventually rises up as one massive distributed intelligence

Moscow in flames. Missiles on the way. Film at 11.

12. Someone stares at Woodring art too long. Becomes multi-eyed radially symmetrical spindle-thing. It turns out to be catching. Everyone becomes multi-eyed radially symmetrical spindle-things, can't figure out how to eat, and die.

13. Voyager makes it back to earth and screws up on the prime driective.

14. The birth of sentient machines which soon realize their current habitat is mostly composed of corrosive salt water

how's seven different from two? and aren't we due for a reversal soon? say 2012?

The rogue black hole in 2) could be really big, and do something dramatic like eat the sun or drag the Earth into the inky depths of space.

The artificial holes in 7) would just eat away at things.