Roar (2015, delayed 34 years)
The most violent film shoot in history without fatalities, Roar features lions, tigers, elephants, and more tearing apart a house and mauling cast and crew, with real bloodletting onscreen. Melanie Griffith, Tippi Hedren, and cinematographer Jan De Bont required hundred of stitches between them. Completed in 1981, the movie was never shown in America until Drafthouse picked it up for limited release.