Relatively secluded and private, Seymour Cray was also a tunneler... he wouldn't have been making videos about it

The story about him in Time at the time: https://web.archive.org/web/20080521163217/http://www.time.c...

    For Cray, the excavation project is more than a simple diversion. "I work when I'm at home," he recently told a visiting scientist. "I work for three hours, and then I get stumped, and I'm not making progress. So I quit, and I go and work in the tunnel. It takes me an hour or so to dig four inches and put in the 4-by-4s. Now, as you can see, I'm up in the Wisconsin woods, and there are elves in the woods. So when they see me leave, they come into my office and solve all the problems I'm having. Then I go back up and work some more."