[qznc]

Watch one of his keynotes. He sits down with some bullet points on a tablet and then talks for three hours:

https://youtu.be/Uooh0Y9fC_M

[masklinn]

Carmack's talks are mind-blowing, he just talks off the cuff fluently for two-three hours and it's consistently interesting, it's completely insane. Here's one he gave at SMU in 2014: https://www.youtube.com/watch?v=fOzkUKJCxTw