Non-Newtonian fluids are substances that can act like both liquids and solids, depending on the pressure exerted upon them. Here are some video clips showing experiments people have undertaken to show the various properties of Non-Newtonian fluids.
A pool filled with non-newtonian fluid: This clip from a Spanish TV show features very excited people walking across a pool filled with a mixture of cornstarch and water.
Brainiac John [sic] Tickle walking on custard live: Presenter Jon Tickle, from the UK TV show Brainiac: Science Abuse walks across a wading pool filled with water and custard powder.
Cornstarch Science: This experiment, which involves shaking a tray of Non-Newtonian fluid and blowing holes in it, was performed at the Center for Nonlinear Dynamics at the University of Texas at Austin.
Cornstarch Monster 1: Watch as small shapes are created by sending vibrations through Non-Newtonian fluid.
Fluido no neutoniano: A bowl, two hands, and some Non-Newtonian fluid fun.
Non-Newtonian Fluid: The Riddell family explains and demonstrates the properties of Non-Newtonian fluid.
Non-Newtonian Fluid 2: This clip shows what happens when a container of Non-Newtonian fluid is placed above a sub-woofer putting out sound at 50 Hz.
Gloop: A musical montage of fun things to do with green gloop.