We create home automation S/W and have it installed in the workplace.

For some reason the lights in the Help Desk/Testing department didn't turn on this morning. At the time our lead engineer was there too.

Rather then try sort it out themselves, they called R&D and got us to check the issue out. Turns out the lighting had been tripped over the weekend when the maintenance department was doing some work.

As we were investigating the issue they were just talking about their weekend so could of easily investigated it themselves!