Funniest thing I remember about the SMG:
One year (when I was lowly naval cadet), we are on parade in Esquimalt and the guard was provided by the female division. They had been training to do it with the SMG, and my division was the first one right behind.
Parade is formed and we are all waiting for the reviewing officer to arrive, when the parade chief, CWO Vincent, of the PPCLI but also a retired "volunteer" from the Rhodesian and South African forces fighting guerrilla in their part of the world, spotted one girl whose SMG had drifted down to about 30 degrees off the vertical. So, chief Vincent smartly moved over, straightened the SMG and bellowed: "Hold that weapon properly!" adding in a more hushed tone right after: "It's a beautiful killing machine!"
We almost all died of laughter in our division and had hard time keeping a straight face that day every time we glanced towards the guard. ;D