Back To The Wall
Having your back to the wall doesn’t mean that you have nowhere to go, it means that you’re safe. When you don’t have to look behind you, all you need to watch out for is a threat from the front. Soldiers tend to choose a seat with a wall behind them even in civilian life.
Hospital Corners
Soldiers are all about neatness and their beds are no exception to that ideal. “Hospital corners” ensure that all beds are neat and that they all look the same. It’s a bed uniform after all.