I attended a UCLA extension course he gave sometime in the mid-90's. He was clever and funny and taught well. He talked a little about the earliest days of the C++ compiler, when it was mostly horrible C preprocessor macros. It's been a while, but I think he said that he'd worked at Disney on the tech underlying Lion King, the movie, not the show, ride, etc. He was rather pleased with the architecture of a stampede scene; each (water-?)buffalo an instance. I would've liked to spend more time in his company.