A technique pioneered by Brazilian radical Augusto Boal. A play or scene, usually indicating some kind of oppression, is shown twice. During the replay, any member of the audience ('spect-actor') is allowed to shout 'Stop!', step forward and take the place of one of the oppressed characters, showing how they could change the situation to enable a different outcome. Several alternatives may be explored by different spect-actors. The other actors remain in character, improvising their responses. A facilitator (Joker) is necessary to enable communication between the players and the audience.