Total existence failure

'Simply sit back and twiddle your thumbs as, completely by chance, all 200,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000 atoms making up the planet Earth suddenly, simultaneously and spontaneously cease to exist.' -- No. 10 from "Top 10 Ways to Destroy Earth"
And the best part is that it's entirely possible (although not at all very likely).
In other news, black holes from the LHC are not about to destroy the Earth yet. Doomsayers, look elsewhere.