I still haven't seen all of "Mr. Show", but I've always marveled at the extensive "Jesus Christ Superstar" parody since it's so long and elaborate and clearly had so much energy expended on it, but it has so few actual jokes in it and the audience (and my own) response was so lukewarm. There's some kind of unfortunate comedy ratio going on there where the effort far outweighs the actual laughs, but you have to admire their dedication to the premise.