I was actually one of those curious enough to become an extra in the filming of the movie, "Blood Circus," when it was shot at the Baltimore Civic Center (now called the Baltimore Arena... and I wonder whether the venue changed its name because it wanted to distance itself from this horrible creation). I played myself, a photographer, who stood ringside to act as a photographer during the fight sequence. If I recall, the people became very upset as the filming unfolded.
The filming was not at all done with any thought-out planning. The producer kept promising things for the audience, but the rate of filming was so snail-paced and uncoordinated that the "audience" - made of people who came based on promises of some good things - didn't get what they thought they were promised. I couldn't have cared less, because I just wanted my face in a movie, no matter how good or bad.
I was present at the "World Premiere" at the Patterson Theater, and I couldn't believe just how pathetic a finished film could have been. I remember that I actually was one of the few who remained, after most of the paying customers had walked out in anger. Even "Plan Nine From Outer Space" had a level of entertainment. Maybe not "Glitter," but that film was even better than "Blood Circus." But I still would like to get my hands on a copy of the movie. I wish that someday someone would make a copy available. No matter how poorly a film might have been created, it still seals a moment in time.
Review by EyeDunno from the Internet Movie Database.