What a cool experience! I never noticed the divergent stairwells until re-watching this clip, that's a nice architectural feature.
Off topic but have you ever seen a diverging diamond interchange? They built one in my city a few years ago (the first in California). Quite unique.
I had to look it up, there are several in Texas too and a few more under construction!
I thought I had heard that Texas was one of the first states to use them. It's an interesting experience driving across it. Hope you can check one out at some point.