Quiet In Line
Soldiers are used to standing in line in complete silence. So, they do this even in doing regular stuff like standing line for the ATM or waiting for the bus. This is because they trained to stand in controlled silence when they are waiting for orders or when they stand in line before entering the mess hall.
Checking Your Car
Safety always comes first for those who have been to the military. They are used to the discipline of checking their vehicles before going to a mission. They have to make sure that the said vehicle is ready and safe for the mission. It doesn’t matter whether it’s an armored personnel carrier, a helicopter or a fighter jet, they would still check it every single time. Even after their time in the army, they still have this habit of checking their own private vehicle before they use it.