LOL!!!
Poppa drove ambulances later in the war, and also pulled guard duty in a psych ward. He told us that he slept on a table in the middle of a day room, and he left the keys hanging on a hook alongside the door. If any of those crazy SOBs were going to escape, he wasn’t going to stand in their way. At least, that’s what he told us.
Back in the day...who knew? Probably anything that worked.