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A magnet dropped through a copper tube. Found here, which has some more explanation.

Shear thickening effect on corn starch from a subwoofer.

Various interactions between the elements if they were at an awkward social gathering.

Did you know that everything is magnetic? The correct application of a magnetic field can make almost anything can levitate, even frogs and water. More info on this phenomenon here and here.

Below is a video of a levitating frog. You go little buddy!

National Geographic sets up a series of experiments to test claims of telepathy, with interesting results.

A creepy effect occurs when corn starch and water is exposed to an 80 hertz sound wave.