Itzhak Stern: I'm sorry, Herr Direktor, you're running very late. Here, this is for the Obersturmbahnführer and this is for his niece, it's her birthday, Greta. Greta as in Garbo.
Oskar Schindler: By the way, don't *ever* do that to me again. Didn't you notice that man only had one arm?
Itzhak Stern: Did he.
Oskar Schindler: What's his use?
[gets into his car]
Itzhak Stern: Very useful.
Oskar Schindler: [shouts from car window] How?
Itzhak Stern: [shouts back] Very useful! Success!