“1. The ventilation system of any building is the perfect hiding place. No one will ever think of looking for you in there, and you can travel to any other part of the building you want without difficulty.
2. You’re very likely to survive any battle in any war unless you make the mistake of showing someone a picture of your sweetheart back home,
3. Should you wish to pass yourself off as a German officer, it is not necessary to speak the language. A German accent will do. ”