The last show is crazy, they will improv stuff and the lines that the crowds chant sometimes won't even be spoken sometimes. A lot of fan service kind of things.
The most memorable show I would have to say was the Twitter Wavelength Analyzer Transmission where during the opening monologue a giant roach freaked out Bill Ted and the guy talking. Then after that during Christian Bale's tantrum about the lighting, one of the dancers that had broke her leg early on in the season came out with a cart bellowing "Light up sh!t!! Get your light up sh!t!!!!".