You've got to check out this awesome mind bending illusion that shows a stream of water unnaturally warping and bending in way you never thought possible. It's a very cool illusion, one you wouldn't be able to see with the naked eye.
So how did YouTube user brusspup pull this off? The effect only works through the camera, Gizmodo breaks it down simply, "The camera is set to match the vibration of the speaker so it's recording at 24fps while the speaker is pumping out a tone to 24hz. That creates this magic of zig zag. If you wanted to see water flowing in reverse, set the tone to 23hz."
Check this awesomeness out!