Michael Imperioli mentions "3 o'clock" saying he is not allowed to ever say what 3 o'clock mean through out the show. Many fans believe tony is killed in the final scene, by the guy in the members only jacket coming from the bathroom. The angle he would shot from would be 3 o'clock on a clock face. Its worth mentioning several writers and directors of the show have stated Chase laid out out the show would end to them as early as the first season.