He did it every semester, but I still love the gimmick. In the western astronomy part of his Astronomy and Culture class, Prof. Aveni would describe Kepler's arrival at an amazing theory about planetary orbits (which turned out to be totally false). He hammed it up, mimicking Kepler drawing on a chalkboard, stopping, and then leaving the classroom without explanation. While students variably chuckled, wondered, or rolled their eyes, he would walk around to another door and re-enter dramatically. That's the sort of showmanship that makes students remember your class.
Prof. Aveni was a big influence on my teaching style. I am pursuing an academic career right now, and I've found that one of my strengths in teaching is enthusiasm and animation when lecturing. Another is ruthless editing of exercises each semester to constantly improving them. Both of these elements I learned from Prof. Aveni. I find it admirable he was still trying to perfect his courses after 100 semesters teaching.
I can also thank him for helping me to pursue science communication opportunities. Despite being a climate scientist, I have given a guest lecture on ancient Chinese astronomy here at CU Boulder... and much of that material I learned from him. I work regularly at the planetarium for star shows, too, and he, Dr. Balonek, and Joe Eakin are the three people responsible for getting me into the planetarium in the first place.
You are one of the most engaging, interesting teachers I've met, and Colgate was lucky to have you there for so long. I sincerely hope you have a wonderful retirement, because you surely deserve a rest after such a long career.