So did you feel a little light headed and a little lighter on your feet at precisely 9:47 UTC[1] this morning? I know I did.

http://www.snopes.com/humor/iftrue/zerogday.asp

ps. There is no gravity; It's just that the Earth sucks. In your heart, you know it's flat.

[1]The tweet got it wrong. It's UTC, not PST.