In the show that Randy is in, And Then There Were None (at Driftwood Players, go see it!), a gun has to fire. I won't say how many times. It's a real gun that uses blanks and they have a gun master to keep watch over it. But if it fails to fire, he can hardly leap onto the stage to fix it. That's up to the actors to deal with - and deal with it they have.
The worst time was Saturday night when it failed to fire each time. When someone is charging at you and you have a gun in your hand and it fails to fire, what do you do? You can't rewrite the play and have the wrong person die. You can't say "bang" -- this is a moment of high tension and drama, not a cartoon. One actor proved resourceful and chose to conk the other person on the head with an ashtray. None of the actors blanked and it worked out.
Ominously enough, in the theatre lobby is a sign that reads, "Warning! There may be gunfire during this performance." For this show, new emphasis on "may".
Addendum note: they have a new gun.