Remote Support in the dark
Worked with an outfit supporting small medical office in the UK. We were still using XP (haha) and I had to manually patch each machine with the latest updates. We had one particular office that was unable to be contacted, and we had to call in for the office manager to check the server. She was compliant and the server came back on but only for a few minutes then it was not responding.
I picked the short straw and had to go down to the facility to see what was going on. Log story short, the office manager replaced the server power cable with the kettle cable as the other one was longer, and every time she went into the server room and plugged it in and left, the door closing would pull the plug out. Even better, the server was moved next to the door as the kettle plug didn't reach and damaged the patch panel.