Accelerometer. Heh.
When you're on the site and you mouse over the illustration, this message appears:
Presented in partnership with Qualcomm, Craigslist, Whirlpool, Hostess, LifeStyles, and the US Chamber of Commerce. Manufactured on equipment which also processes peanuts. Prince includes 2-year Knicks contract. Phone may extinguish nearby birthday candles. If phone ships with Siri, return immediately; do not speak to her and ignore any instructions she gives. Do not remove lead casing. Phone may atttract/trap insects; this is normal. Volume adjustable (requires root). If you experience sudden tingling, nausea, or vomiting, perform a factory reset immediately. Do not submerge in water; phone will drown. Exterior may be frictionless. Prolonged use can cause mood swings, short-term memory loss, and seizure. Avert eyes while replacing battery. Under certain circumstances, wireless transmitter may control God.
But it doesn't tell us what to do if we get stuck on a phone call for more than four hours!