Hahaha. Kids. That song is older than Jackie Brown and Tarantino wasn't the first to use it. Is from the movie of the same name, (Across The 110 Street,1972) With Anthony Quinn. The song makes its appearance again in the movie American Gangster (Ridley Scott, 2007)
like many others here @ lastfm, the film Jackie Brown is first thing i also think of when i hear this gem from Bobby Womack~ specifically the end scene of Jackie driving, saying nothing but her face reflecting her mind as it races backwards and forward in time .