Could it be a reference to the ending of _The Dumb Waiter_? In this play, Gus and Ben are hitmen partners; Gus leaves the room before their victim is due to arrive, Ben prepares his weapon for the assassination, and the door opens to reveal Gus.
> BEN: Gus!
>
> _He takes out a comb and combs his hair, adjusts his jacket to diminish the bulge of the revolver. The lavatory flushes off left. BEN goes quickly to the door, left._
>
> Gus!
>
> _The door right opens sharply, BEN turns, his revolver levelled at the door._
>
> _GUS stumbles in._
>
> _He is stripped of his jacket, waistcoat, tie, holster and revolver. He stops, body stooping, his arms at his sides. He raises his head and looks at BEN._