The "slightly alien" thing and this:
he kept grimacing as if not quite in control of his face
You can (or could) watch EY debating (e.g. w/ that presumptuous jaron lanier guy) over videoconference and like many less-polished speakers he has some visible tics while searching for a thought or turn of phrase while feeling under the gun + not wanting to lose his turn to speak.
Cover title: “Power and paranoia in Silicon Valley”; article title: “Come with us if you want to live: Among the apocalyptic libertarians of Silicon Valley” (mirrors: 1, 2, 3), by Sam Frank; Harper’s Magazine, January 2015, pg26-36 (~8500 words). The beginning/ending are focused on Ethereum and Vitalik Buterin, so I'll excerpt the LW/MIRI/CFAR-focused middle:
Pointer thanks to /u/Vulture.