The first line is an allusion to 'Chekhov's gun'. The playwright Chekhov said that if a revolver is introduced in a play or even hangs on a wall, it must go off later in the play. i.e. everything in a play or work of art has to have a point, otherwise leave it out.
I'm not sure how this relates to the song, maybe Kevin means he knows that she'll definitely "go off" later, with a bang i'm assuming.
The first line is an allusion to 'Chekhov's gun'. The playwright Chekhov said that if a revolver is introduced in a play or even hangs on a wall, it must go off later in the play. i.e. everything in a play or work of art has to have a point, otherwise leave it out.
I'm not sure how this relates to the song, maybe Kevin means he knows that she'll definitely "go off" later, with a bang i'm assuming.