Ok, not the best impression I've heard, but a Marine doing it while pulling over an Iraqi at a road block equals... Best. Situational use. Ever.
http://www.youtube.com/watch?v=-x7JYADhWIo (http://www.youtube.com/watch?v=-x7JYADhWIo)
Did you ever hear Jim Volkman do Harry? He was on AM1000 in Chicago in the late '80's early '90's. It was dead on. Dead on.