There's an old adage that when you show the audience the gun in the first act, that gun has to go off by the end of the play.
Uh huh. Right.
Once upon a time, there was a little boy with a very large gun.His father always kept it in the nightstand, and it didn't have a child safety lock.
The boy knew the gun was in there unlocked. So, standing on his very tippy toes, reaching, he got it out.
Looking over the gun, he checked to see if it was loaded.Sure enough, it was.
And it was in his hands.
So, the little boy took the child safety lock out of the shopping bag and locked it up.
But he forgot to give his father the key.

