I took his Introduction to Cryptography class when he was a visiting professor at Columbia. Absolute master of an old-school chalkboard lecturer. They don't make them like that any more.
I took his Computability class in the Hebrew University. He got angry that students were often late to class, and said that this never happened in Harvard...
For those interested in searching for more here's a Hebrew search string you can use: "פרופסור מיכאל רבין הרצאה" interesting enough Google and YT search yield results in English and Hebrew but possibly different ones than just searching in English.
e.g., x minus x is zero, even for Euler, so therefore…
Found on Archive, https://web.archive.org/web/20210509160248/http://www.eecs.h...