John Cazale/Sal
You remember the scene where Sal looses his temper because of one of the clerks wanted a cigarette, and he says he wouldn't want "one of those cancer" and this is why he doesn't smoke?
Well guess what, the actor portraying Sal, John Cazale, died of terminal lung cancer not 3 years after this movie was released...
Crazy how life is.
People who don't like their beliefs being laughed at shouldn't have such funny beliefsī²