Their are many. but i always thought this to be funny!

Tom to Woltz

I'm German-Irish....

Woltz
Well let me tell you something my Kraut Mick friend, I'm gonna make so much trouble for you, you won't know what hit you!

Tom: Mr. Woltz, I'm a lawyer, I have not threatened you.

Woltz:
I know almost every big lawyer in New York, who the hell are you?
That who the hell are you is just too funny!