 Co-operative games require the participants to work together to achieve a specific result, such as balancing against each other's bodies while in physically awkward positions or keeping their hands in contact while performing various improvised movement exercises.Competitive games require the participants to work against each other, as in contests of balance and speed.Participants also alternate between moving "in character" and as themselves, between improvised and choreographed exercises and between assuming active and passive roles during the various exercises.