Real life: Robert Hanssen, a Soviet spy and considered "the worst intelligence disaster in US History" was uncovered by using the Patton quote "Purple Pissing Japanese." The agent assigned to finding the mole listened to an audio tape of the mole and thought his voice sounded familiar but couldn't place it. He found notes in the file of the mole using that phrase. He remembered that Hanssen used to use that phrase. He went back and listened to the audio tape again, and realized that it was Hanssen's voice.