Tell ’em, and tell ’em, and tell ’em again
When I first heard this, I felt that he was just spouting an arcane cliché that had no real meaning. After all, I was the English major and he was the engineer. I knew about the use of repetition to add emphasis, but favored a more moderate use of the technique. The engineer was adamant, "We're gonna tell 'em three times! If we don't tell 'em three times, they ain't gonna get it!"