There has never been a performance like this on SNL before or since and there probably never will. The only reason FEAR got booked was because John Belushi called in some favors and the shows ratings were in the toilet that year. As the last song begins the mike is cut and they fade to commercial. This was unplanned and done because the producers panicked...they feared a real riot was about to unfold live on their TV show and went to commercial.
Songs include Beef Bologna, New York's Alright If You Like Saxophones and Let's Have A War.
To hear about what was happening in the audience and behind the scenes check this out...http://www.videosift.com/video/Riot-on-the-Set-of-SNL-When-Fear-Played-in-1981