I've never seen or heard Wagner's Ring Cycle, but that isn't stopping me from going to the ACT Theatre parody of it, Das Barbecu, tomorrow night.
Of course, knowing something about the 20-hour, four-part opera being parodied would probably help. Fortunately, singer Anna Russell provides a delightful synopsis, which has been posted on You Tube. (The synopsis is also in four parts, each about 10 minutes. I linked to Part 1, which was the only one I could find that had video as well as audio. It's worth tracking down and listening to all four parts.)