The next movie I watched This is Spinal Tap (1984) which is #29 on the 100 Greatest Comedies list.
This movie has a lot of phrases and scenes that have become pop culture icons including the "goes to 11" scene which is likely it's most famous. The movie is set up as a mockumentary (maybe even one of the first ones) that follows the fictional band Spinal Tap. Spinal Tap seems like a mash up of the Beetles, the Rolling Stones, and several of the larger bands of the day taken to the extreme. Everything they did was as far out there as they could think of but still be "possible" in the real world. Although some of the movies on the 100 Greatest Comedies list were slightly humorous, many didn't make me laugh out loud. This movie was different. Through most of the movie I couldn't stop laughing even though there were several parts I felt I was missing the joke. Perhaps some of it didn't age as well as others but in general this is still a fantastic movie.