Had a service call to an old house. One of the fuses had blown, but when the customer replaced the fuse, it still didn't work. He had tried several new fuses with no luck.

I was assuming that he was trying to screw a 20 amp fustat into a 15 amp adapter or something like that. But upon seeing the panel that wasn't the case, it was a new 15 amp fustat in a 15 amp adapter so it should have worked fine.

As I stood there in front of the panel holding my flashlight with the customer right beside me, I unscrewed the fuse. Hidden from him, but visible to me I could see that a piece of bakalite thread had broken free and was holding the fuse out. One quick blow into the fusholder, fuse reinserted, the lights came on. The customer stood there looking at me as though I was a mystic LOL. What the he&&? he asked.