After Mainwaring complains of sloppy slauting, a runaway barrage balloon appears with the Verger clinging onto it. He's rescued and various people, including Godfrey's sister Cissie, are asked to hang on until Mainwaring takes charge. Unfortunately, it takes off in the breeze with Mainwaring on the other end of its rope, dragging him through trees and a haystack until it stops on a railway bridge. The men are about to secure it but then an officer comes by and, in order to perfect the saluting so beloved of Mainwaring, they have to let go of the balloon.