Sharps punched a button on the phone console. "Larry. Get us some coffee, please." He turned back to Harvey. "Damndest thing," he said. "Whole nation depends on technology. Stop the wheels for two days and you'd have riots. No place is more than two meals from a revolution. Think of Los Angeles or New York with no electricity. Or a longer view, fertilizer plants stop. Or a longer view yet, no new technology for ten years. What happens to our standard of living?"

Larry Niven & Jerry Pournelle, Lucifer's Hammer

Or, a 6 hour lolcat outage. Or a 2 hour twitter downtime. Bath salts for everyone!