TIL the father of supercomputing, Seymour Cray, had a hobby of digging a tunnel under his home.
TIL the father of supercomputing, Seymour Cray, had a hobby of digging a tunnel under his home.

Seymour Cray - Wikipedia

Another favorite pastime was digging a tunnel under his home; he attributed the secret of his success to "visits by elves" while he worked in the tunnel: "While I'm digging in the tunnel, the elves will often come to me with solutions to my problem."
Wikipedia cited a rather entertaining Time article as a citation for this.