Works of art that were once radical tend to find their cozy place in the cultural ecosystem. It’s almost funny to think that an audience ever booed “The Rite of Spring,” or that the Sex Pistols shocked people to their souls, or that museum patrons once stood in front of Jackson Pollock’s splatter paintings or Warhol’s soup cans and said, “But is it art?” In 1971, “A Clockwork Orange” was a scandal, but it quickly came to be thought of as a Kubrick classic. Yet “Natural Born Killers,” a brazenly radical movie when it was first released, on August 26, 1994 (25 years ago tomorrow), has never lost its sting of audacity. It’s still dangerous, crazy-sick, luridly hypnotic, ripped from the id, and visionary. I loved the movie from the moment I saw it. It haunted me for weeks afterward, and over the next few years I saw it over and over again (probably 40 times), obsessed with the experience of it, the terrible lurching beauty of it, the spellbinding truth of it. It’s a film that has never left my system.