Since improvised theatre usually does not require props and the end of the scene is determined by the moderator or the players, the curtain cannot be closed immediately at the end of the scene as in normal theatre.
Here the moderator therefore carries out a movement from the side that indicates the falling of the curtain. When a lighting technician is in the hall, he can also turn off the light on the stage for a brief moment. Otherwise, the presenter can ask the audience for help in moderating by closing their eyes for a moment and imagining the curtain falling.
by Guido Boyke