One of the distinguishing features of spex as opposed to other forms of theatre is the central prominence of audience participation. The audience have established lines, shouting "Restart!" (Swedish: Omstart!/Omtag!) or "One more time!" (Swedish: En gång till!) if they consider the current scene to be of particularly high quality. The actor is then expected to improvise the scene or punchline in a new way. There are also several other commands that the audience can give, such as demanding that the actors should perform the current scene backwards, in slow-motion, or in another language.