[cardguy]

Quote:

A gravity hill, also known as a magnetic hill and sometimes a mystery hill, a mystery spot, or a gravity road, is a place where the layout of the surrounding land produces the optical illusion that a very slight downhill slope appears to be an uphill slope.

Thus, a car left out of gear will appear to be rolling uphill against gravity.

There are hundreds of recognised gravity hills around the world.

http://en.wikipedia.org/wiki/Gravity_hill

http://en.wikipedia.org/wiki/List_of_gravity_hills

This one tickles me since I love the idea of a novel optical illusion only being discovered due to a new invention (in this case the car).