http://wins.failblog.org/2012/07/05/epic-win-photos-book-fountain-win/
It’s a water sprinkler attached to a sculpture of an open book, such that the water has the appearance of a page being turned. It’s not just that the water goes back and forth–the water stream is rigged somehow to appear to “bend” far to the left of the sprinkler’s rotating cycle, giving the “page turning” effect that much more realism.
I’ve seen water sprinklers of course, but to my recollection, when the sprinkler is pointing straight up, the water goes straight up and down, regardless of the momentum of the rotating sprinkler itself.
Am I right to think that the effect in the animated gif would only work in the presence of wind?