In this performance Abramović and Ulay stand opposite of each other and make long sounds with their mouths open. Gradually, they move closer and closer to one another, until eventually they are yelling directly into each others open mouths. The performance, which lasted 15 minutes, continued until both artist’s voices were out of sync and failing from the continuous yelling. This piece demonstrates their interest in endurance and duration, as well as an exploration of aggression between physically present figures, one male and one female.