I used to work in a small public library with its share of problem patrons. It seemed like the mere speaking aloud of the names of our favorites would cause them to appear in the library. A lot like when you learn a new word and suddenly you hear and see it everywhere!
It was almost spooky. We hadn't seen the fish-tank-fouling, puzzle-destroying children in months. Mentioned them by name. There they were. Mr. Writes-threatening-letters-to-public-officials-on-the-library-typewriters disappears for weeks. Ask co-worker if she's seen him? Next day, typing away. Just like "He who shall not be named," we starting calling them by code name to avoid invoking them.
So, remember the Flexagon? Somehow, probably through Craftster, I got a link to a related design called a kaleidocycle. (There's a printable Escher kaleidocycle here. And the good people at Foldplay will put your own pictures on one for free!)
But anyway, that's not the weird part. Not two weeks after seeing these beauties, my husband tells me his co-worker is helping settle an estate and there's some stuff I might like. He hands me an old copy of THIS BOOK.
[Insert creepy music here]. I swear, I invoked it.