The most amazing thing was that this guy was by no means stupid IRL. He was a super smart scientist; can't remember his exact specialization, but it went way above my head. He wasn't even that old -- late 30s or early 40s. To have a guy like this unable to figure out his own character in a computer game was something so incomprehensible to me that it just left me dumbstruck.
He also was never able to learn out of keyboard turning.