A few years, systems had setup a new windows workstation for me. It had been running 24/7 for about 10 months. Xmas came and I'd taken some extra days so someone shut it down on the 24th. On 2nd January I came in and it took me several minutes scroffling about under the desk to locate the damn power switch, if fact it was a colleague that pointed out that the button next to the DVD drive was the power button.
Then there was the time I was talking to some tech support about a bit of kit that need jumpers reconfigured. I'd taken the thing down stairs so that I could fiddle with it whilst on the phone. Eventually he says OK plug in now and see if it starts up. So I pulled the plug that was in the socket out and plug the bit of kit in. Naturally the plug I'd pulled out was powering the phone. Fortunately the thing powered up OK.