Goofs:
Continuity: In the opening scene, when Sonny is walking to the bank, he holds his gun in some gift wrap. The blue ribbons are crossing where the flower is. In the next shot, the crossing is moved much closer to the top, as if to make it easier to open the box. But when Sonny tries to open the box to get the gun out, the ribbon is back to its starting position. (more)

Trivia:
Frank Pierson wrote his Oscar-winning script around only 12 sequences. (more)

Filming Locations:
10th Street, Flatbush, Brooklyn, New York City, New York, USA (more)

Quotes:
Sonny: What's wrong with him? Hey? Hey? You okay?
Sylvia: He's got diabetes. He's not a well person.
Sonny: Those bastards - they poisoned the pizza! Sal - you didn't eat any pizza?
Mulvaney: I didn't eat any pizza.
Sylvia: I told you, he's got diabetes.
Sonny: You're supposed to balance your sugar diet, right?
Sonny: [Exits bank] Hey! Is there a doctor over there? Get him over here! Come on, on the double!
Sheldon: What's wrong?
Sonny: The manager, he's diabetic, he's lookin' bad.
Sheldon: DOCTOR? We need a doctor here!
[...]
(more)

Awards:
Won Oscar. Another 10 wins & 17 nominations (more)