Reminds me of a story an old coworker told me. He was working as a repair tech back in the days when computers had tape drives. He was called out to a military base where they had just moved their computer one floor up, because the tape drive kept glitching. It would start up fine but then error out some seconds later, seemingly at random. After staring at this for quite some time he finally decided to stretch his legs and wander to the window. And what did he see, but a radar antenna rotating around. The glitches happened every time the antenna was pointed in his direction. On the lower floor it was out of the beam so there wasn't any problem.