Yeah, I saw the same thing on Mythbusters. Seems like it could be an easy way to make some cash in a bet.
if i dumped 20 tons into my pool...think it'd mess up my filter? eh, better not, but that was very cool.
you know, this reminds me of one of the greatest artistic contributions of the 20th century. http://www.youtube.com/watch?v=DxEZvix6Wc4
My wife made some of that at the daycare she runs... It's particularly cool when you add food coloring... That there, however, is what you call a crapload...