Working for a large manufacturing company, I got a call from an electrical engineer/production supervisor that his monitor was dead. "The yellow light on the monitor is on, but it doesn't turn green, and nothing's on the screen."
So I walked the 1/4 mile to his office on the production floor, looked at the monitor, bent over to look at the PC under the desk, reached out and pushed the power button, turned to him as the POST screen displayed, and said, "There ya go." and walked back out the door as his officemates giggled.
He wouldn't acknowledge me for several weeks when we met in the building.