"Alright guys, looks like we are meant to fire now... does anyone remember what is next after we have put the priming powder in? Any ideas?? Yes, Bill?"
Lo, tho I walk thru the valley of the shadow of death, my clean white shirt and two cavalry generals doth comfort me--the guy out front might have a problem tho.
Let us see according to the instructions ,you stand where you are Sam, in front,while we fire the cannon. Remember not touch the barrel after the ball as left,and do not,do not attempt to catch the ball as it would alter its course.If the cannon does not fire Joe and Bill will then add more powder ,repeat the previous instructions,but not till I am in in the rear !
With a nod to Monty Python ... "Bless this, O Lord, the Holy Rodman Gun of Antioch, that with it thou mayst blow thine enemies to tiny bits, in thy mercy."