At the Union Station train depot in Oakland, Dennis Hopper made fast friends with the two Asian children seen in the film waving at his character as he departs the waiting area. He spent his off time playing with the kids during set up. Their reactions to him in the film are genuine.
The ending was filmed at an old beatnik hangout, City Lights Bookstore that is run by Lawrence Ferlinghetti who published Jack Kerouac, Gregory Corso, Diane DiPrima, Jack Hirschman, and Allen Ginsberg which City Light's published his most famous poem, "Howl".
Scheduled for a fall 1989 release, but was bumped to February 1990 to accommodate Paramount's heavy fall slate that year. Because of this, the music video for "Free," Big Audio Dynamite's theme song for the film, aired over a month before the film's theatrical release.
Whilst in the dining car of the train, Dennis Hopper's character refers to Kiefer Sutherland's character as a 'rebel without applause' which is an obvious reference to Rebel Without A Cause, the famous 1955 film starring James Dean which co-starred Dennis Hopper.