I couldn't disagree with you more. This isn't 15 year olds in high school. I found the interruptions to his lectures totally unacceptable, inconsiderate and selfish... and 9/10 times, it was a unbelievably stupid question that he had either already addressed, he was going to address in the next couple of slides, or that you could easily figure out if you thought about it for a second. If he hadn't been firm about his "save your questions for the end" policy, an eight hour lecture would have been 12 hours long. Also, the lectures are recorded, so if someone misses something or doesn't get it, go back and watch it later... People would actually stop the class to say they didn't understand! Are you kidding me?! We need to wait to move on to the next slide until all 80 people understand?! I only wish he had been more stern about it.