After the finale, a narrator tells the audience "One moment please. And now our wonderful cast." Then, the principal cast members are introduced one by one, like they would be at the end of a play. After that's done with, there's a brief scene in which Nancy Kelly spanks Patty McCormack.
"You have just seen a motion picture whose theme dares to be startlingly different. May we ask that you do not divulge the unusual climax of the story. Thank you."