My favorite personal IT story is about a big printer we had that kept jamming, but every time the tech showed up to take a look it would start working again. One time he had just arrived and was standing there talking to the manager, and we all heard the thing resume printing all by itself. Unable to observe the problem or get it to fail while he was there, he finally brought in a wallet-size photo of himself and taped it to the inside of the cover, so it was looking right at the print head.

I swear on everything holy in this world, that printer never jammed again.