From Endgame by Samuel Beckett :
 

HAMM:  Open the window.
CLOV:  What for?
HAMM:  I want to hear the sea.
CLOV:  You wouldn't hear it.
HAMM:  Even if you opened the window?
CLOV:  No.
HAMM:  Then it's not worth while opening it?
CLOV:  No.
HAMM:  Then open it!
      (Clov gets up on the ladder, opens the window. Pause.)
       Have you opened it?
CLOV:  Yes.
      (Pause.)
HAMM:  You swear you've opened it?
CLOV:  Yes.
      (Pause.)
HAMM:  Well...!
      (Pause.)
       It must be very calm.
      (Pause.)
       I'm asking you is it very calm!
CLOV:  Yes.