(This was in the early 90's and it was a school district's file server) so after a lot of fingerpointing and try this try that, I was dispatched to go and sit with the fileserver and watch it fail. So I drive for several hours to this school district headquarters, gaining access to the office where the server is around 9pm. I log in and it seems fine. I run basic diagnostics. All fine. I start to nod off and fell asleep for a time, to be awakened by the rattling of a custodian's cart, wheeling into the room. We exchange how do you do's and in the midst of my saying "pretty good", the custodian reaches behind the file server and unplugs it so he can vacuum the floors.