The riff: Added by Crow after the middle-aged salesman’s father says “You owe a lot of your success to the way Harry Carpenter worked with you.”
The explanation: Rather than just an affirmation of what’s on screen, it’s a subtle reference to a 1975 play and film called “Give ’em Hell, Harry!” about the life and times of Harry Truman. The phrase supposedly originated from the campaign trail of the 1948 presidential election, when a Truman supporter yelled “Give ’em hell, Harry!” Truman’s reply was reportedly “I don’t give them hell. I just tell the truth about them and they think it’s hell.”
Novelty factor: Never heard of this before in any form. Can’t believe there’s both a play and a film based on the phrase.