…when you’re humming along to a new piece of music, and you’re doing the harmony, and suddenly the melody does exactly what you’re humming.
I typically have good instincts for stuff like this, but when it’s exact like that, it’s kind of spooky.
(I suppose I should disclaimdisclose that this piece isn’t exactly “new”; it’s “The Steward of Gondor” from Return of the King. But I really haven’t listened to it all that much, and I was fully expecting the melody to continue as it was going…)