I found a highlights video:
https://www.youtube.com/watch?v=gRelVFm7iJE(I see the full 11 hour deposition is also on YouTube, but I think I'll save that for another day.)
So far, being 10 minutes in, I see a little bit of what you mean, but I haven't gotten to anything "unhinged" yet. He just seems like a bit of a smug nerd who's clearly enjoying going toe-to-toe with one of the country's top lawyers.
Do you remember anything that jumped out for you from the deposition? I'd love to see more of what you're getting at.