Corn starch shaken at several thousand Herz: http://youtube.com/w/Amazing-Liquid?v=CH6-2UizHfI
Corn starch shaken at audible frequencies: http://youtube.com/watch?v=WTCkVh9CWT8&feature=related
Posable iron puck in a liquid-nitrogen-induced magentic field: http://youtube.com/watch?v=c3asSdngzLs&feature=related
The Weissenberg effect: http://youtube.com/watch?v=npZzlgKjs0I&feature=related
Ferromagnetic fluid: http://www.youtube.com/watch?v=jY72o-JAp0Q
More ferromagentism: http://www.youtube.com/watch?v=fpI4EiGACo8&feature=related
Even more ferromagnetic fluids: http://www.youtube.com/watch?v=d44LW6KZ_iU&feature=related
Corn starch pool competition: http://youtube.com/watch?v=f2XQ97XHjVw&feature=related
More silliness: http://youtube.com/watch?v=1eVFONh_5OM&feature=related