This new Madonna video, in which M.I.A. appears (and doesn't do much, along with Nicki Minaj), is not as good as M.I.A.'s new video, "Bad Girls." Considering this, and also the great video Jay-Z and Kanye West made for their song "Otis" last summer, it seems that the Bay Area hip-hop subculture known as "hyphy," which peaked four or five years ago, is having its most lasting cultural impact in the phenomena of the dangerous-looking car tricks known as "ghost riding."