Not my own DDM but my cousin's. He was on a ladder for over an hour trying to fix an overhead light when me and my DH walked in. My cousin was sooooo upset, had his meters out, the hole 9 yards. Said he couldn't figure out what was wrong.
DH asked if he had tried A NEW LIGHT BULB!!!!!!!!!!!!!! The look on my cousin's face was priceless. Got off the ladder, put in a new bulb and voila!!!
Best laugh we'd had in a long time.