As it turns out, this is a commercial for an Asian bank. Still, it’s packed with examples of the bizarre behavior of non-Newtonian fluids… fluids that turn kinda-sorta solid when you whack ’em real hard. Fluids that you can easily run across, but if you stand still, you sink. The most common such fluid, something you may well have on hand, is water mixed with corn starch. Mix up a batch and then punch it, you’ll find your hand bounces off. IIRC, antifreeze (ethylene glycol) mixed with very fine silica powder makes a *really* effective non-Newtonian fluid, to the extend that if you soak a lightweight kevlar bulletproof vest in the stuff and then shoot it, the fluid will solidify so hard, so fast that it will turn into a solid plate. The bullet resistance is still due to the strength of the fibers, but the solid nature of the fluid now spreads the impact over a number of square inches, creating it’s own trauma plate… a plate that both before and after is perfectly flexible.
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