Kept looking around in shock and disbelief during this in a "can you believe that just happened?!" way even though I was watching on my own.

It's camp, it's surreal, it's gothic, it's a bit gay (real "well who am I to judge if it makes them happy" hours r.e. Leonora and Cenci), it's got some of the most disgusting dialogue ever captured on film via Robert Mitchum's character... it's generally not like anything else I've ever seen.