Covering your tracks
After we put the meat in the freezer, we should return the truck.
Return the truck? You want us to go see Mr. Rivet and give back his truck?
Certainly. We don't need it anymore, and it would be impolite not to thank him.
Impolite. After my borrowing his truck without permission again, I'm willing to bet Mr. Rivet is going to violate every notion of “polite” Florence ever had.