A classic experiment/weird experience in materials science, rheology, shear stress, strain rate, non-Newtonian fluid
mechanics – and gooey fun: the Oobleck Run, AKA (with a great deal of
hyperbole) “walking on water.” This video was prepared for the Discovery
Channel’s great new series, Time Warp.

The science behind this has significant implications, for example,
understanding the dynamics behind ceramic armor and how it behaves
under specific stress, strains and temperatures. There are actually
quite a few videos of this and related demonstrations. A few others are
here and here, plus another odd-creepy (is the videographer really seeing a ‘cosmic girl’?) here.