Amazing optical illusion or "glitch in the Matrix"?

(CBS News) Watching this video is a bit like seeing a "glitch in the Matrix". Is it impressive? Without a doubt. Is it science? You know it. Will you possibly start questioning reality? Watch and find out. 

The video was posted by YouTube user brusspup, who has been featured here on The Feed a few times for amazing optical illusions and art, and who writes about it:

This is really simple but has such an awesome effect. Fill a bucket full of water and place it about 5 feet off the ground. Place a subwoofer about 1 foot lower than the bucket. Run a plastic tube from the top bucket down in front of the subwoofer. Tape the tube to the front of the speaker. Then aim the end of the tube to an empty bucket on the floor. Get the water flowing from the top bucket. Now just generate a 24 hz sine wave and set your camera to 24 fps and watch the magic happen. Basically your cameras frame rate is synced up with the rate of the vibrations of the water so it appears to be frozen or still. Now if you play a 23 hz sine wave your frame rate will be off just a little compared to the sine wave causing the water to "move backward" or so as it appears. You can play a 25 hz sine wave and cause the water to move slowly foward.

Another amazing video that has earned a big triple-rainbow salute from all of us here at The Feed! To check out more videos by brusspup, you can go to her YouTube page by clicking here.