What happens when 50 pounds of silly putty hits the ground?

[mikebw]

Silly putty is kind of like a non-newtonian fluid, the more force is applied to it the putty will become more like a solid. http://en.wikipedia.org/wiki/Non-Newtonian_fluid

You can make pools of the stuff and run across without falling in:

http://www.youtube.com/watch?v=f2XQ97XHjVw