Sounds like John Carmack. I seem to recall him doing one of his famous "lock myself in a hotel room and don't come out until I've hacked something cool" things, this time with setting up and using an OpenBSD workstation.

And yes, one time I was fooling with NetBSD and went from zero to hello-world kernel device driver with just the man pages. So it's not surprising Carmack would be able to do the same with OpenBSD.