"Unless gravity went the right way, everyone would be floating around in space.
Then you would have to build your house at the North Pole.
And all the houses would have to be connected to that one house."

--Jeffrey Charles Lantz, age 7, while munching on saltine crackers in the kitchen

(photo from March 2009 = 3/09)

Update, April 2012:
The author of the above quote invites you to view his Myths and Magic website.

So far, gravity is still OK and there are no worries about centrifugal anti-gravity.