1 Mercutio: This is our only take! Will! Ad-lib something!
2 Grady: {played by Shakespeare} It’s gone wrong, Aunt Jessica! Yet we know Robert Pakington, M.P., is murdered here and now! History as we know it will be destroyed unless we do something!
3 Grady: {played by Shakespeare} Fortunately I brought this period gun for self defence. I shall shoot Robert Pakington, M.P., to preserve history!
4 Jessica: {played by Angela} Are you sure that’s such a good i—
4 SFX: BANG!
4 Robert: Arrghh! {falls over backwards}

If you're ever in a situation where you need to act quickly to preserve history, remember to be decisive, act quickly, and launch into a rendition of "Johnny B. Goode" without delay!