Three brothers are quietly sitting in a bar. An older, obviously drunk man enters. He sits near one of them. After a while he slips: "I ****** your mother!". The three brothers ignored them. In a couple of minutes, he repeats "I ****** your mother!". One of the brothers shifts uneasily, but doesn't say anything. In a while, the old man continues: "I ****** your...". One of the brothers turn arround: "Calm down, dad."