Sorry for posting yet another video link, but you have to see this if you have never seen all the properties of non-Newtonian fluids.

This is excellent:

http://www.youtube.com/watch?v=vCHPo3EA7oE&mode=related&search=

And for an even better demo look here:

http://www.youtube.com/watch?v=dYnZ5vNgDWw

Waste even more time here:

http://www.youtube.com/watch?v=NKxKVpHZe5Q&mode=related&search=

And this looks like fun:

http://www.youtube.com/watch?v=f2XQ97XHjVw&mode=related&search=

Blacknad.

I think someone posted a thread on this subject long, long ago. I can't remember who, but that first link is very familiar.

Amaranth