At 16 and 1/2 years old, i joined the JLRRA who were stationed in Bramcote, just outside Nuneaton, Warwickshire. Once I and other NIGs (New Intake Gunners) had boarded the bus to take us to our new home, we began to chatter excitedly only for an acting (unpaid, unwanted) LBdr Gerry Drysfield screamed at us to be quiet. He then muttered those immortal words; "You're in the army, now." As a group we sniggered all the way to camp.
The screaming and shouting is all bluster and, i suspect, is exaggerated for the sake of the cameras.