I had a client at a law firm who moved to a different city, but continued to remote into his computer at work. At some point someone moved it to some other spot in the building so they could have someone else use his desk, and he continued to use it without issue.
Until one day it shut down, while he was in the middle of something very important and lawyery. No one at the firm was willing to look for it (as they were all lawyers), so we had to send a technician on site to just check each room until he spotted an old computer connected to power and Ethernet in the corner of a mail room.
Some months later it happened again, in a the middle of another important time sensitive lawyer thing. Except now he had two headless computers which he used both of (an old computer and a new one he was migrating to), and he still didn't know where they were physically. Luckily there was a intern on site to do the search this time, but it took some time to figure out which was which when we did locate them.