Apocalypse Now: The Canadian Tiebreak
The highly-publicized delays and catastrophes in the grueling shoot (scheduled for about 17 weeks but ending up lasting about 34 weeks), along with extra-marital affairs, a grandiose and suicidal director, drug use and other forms of madness, were mostly due to a rain-drenching typhoon (named Olga) and a star-debilitating, near-fatal heart attack for the star, thejackal.
After its first editing, the original version was six hours long and had to be severely edited. A documentary about the film's chaotic making, shot in part by Coppola's wife Eleanor and including interviews with most of the cast and crew, was titled Hearts of Darkness: A Film-maker's Apocalypse (1991). [Joseph Conrad's novella Heart of Darkness was an inspiration for the film.]