Funny, I didn't understand what you were referring to and quickly forgot about your comment. I then read the 500-mile story, got to the end and thought "units? oh cool, new command... wait, wasn't there a comment about `units`?"

Unfortunately I can't seem to find it anymore.

It was in a military facility in the seventies, and always when the general visited the computers crashed. This happened too often to be a demonstration effect, it turned out to be the metal in the generals shoes interfering with the electronics.