Gravity Hill, on Loma Alta near the Rubio Canyon Debris Basin, has a reputation as the most haunted place in Altadena (perhaps next to the Cobb Estate, a/k/a "The Haunted Forest.") If you put your car in the right place and release the brakes, you apparently go uphill-- legend has it, pushed by the ghostly hands of the children who died in a school bus crash into the basin -- so what if it isn't true? Many teenagers have been lured there late at night for the scare and ... whatever it is they do late at night.
(Gravity Hill will be the subject of a forthcoming Altadenablog video).
Anyway, some killjoy has distributed flyers around the area, neatly debunking the anti-gravity effects as an optical illusion.
As one local newsgroup commenter puts it:
I mean, most of the 'tourists' aren't there for the physics anyway, they're there for the chemistry.
or perhaps for the biology ...