Trivia: During the helicopter stunt, the runners caught on the ropes of the suspension bridge and as the helicopter rose, it threatened to seriously injure both Robert De Niro and John Savage. The actors gestured and yelled furiously to the crew in the helicopter to warn them. Footage of this is included in the film.
Trivia: All of the slapping in the Russian Roulette sequences was real.
Trivia: The scene where Nick spits in Michael's face when they play each other at Russian Roulette towards the end of the movie was improvised by Christopher Walken. Director Michael Cimino convinced Walken to do this, and Robert De Niro was completely surprised by this, as evidenced in his reaction. In fact, De Niro was so furious about the unscripted improvisation that he almost quit the production.
Trivia: The wedding scene at the church took five days to film and the producers used an actual priest.