Well, what would YOU do with these two? You can only turn your back and pretend you didn’t know. Because they’re going to do it anyway.
When Hogan’s Heroes Schulz said, “I see nothing,” this is generally what Germans meant. If you were sneaking a friend to safety or giving clothing to a German woman’s Jewish daughter (true story), Germans would look away and pretend you weren’t there. Because if they knew, everybody was dead. They got really good at looking up and going, “Look! Air!”