Apocalypse Now
The handsome Marlon Brando had a ‘bad boy’ rep, though apparently this applied to his work ethic on set as well. The Apocalyspe actor was prone to throwing fits and he wanted to change many of his lines. It probably annoyed Francis Ford Coppola, the director, though they had no choice but to let him do as he pleased.
Blade Runner
Man, the ‘tears in rain’ monologue is definitely high up in our favorite scenes in cinema history. The Blade Runner closing scene was apparently improvised by Rutger Hauer himself!