Entertainment Matt Damon uses toilet water in Ice Bucket Challenge video Matt Damon dumps toilet water on his head for Ice Bucket Challenge By AMNY.com August 26, 2014 2:06 PM Print Share Share Tweet Share Email Matt Damon is a known environmentalist, so when he received the ALS ice bucket challenge from Ben Affleck, he took some time to consider how best to address the situation. California is suffering from a massive drought, and much of the world has no access to clean water, he explains in the YouTube video posted by Water.org, the non-profit he founded. Check out what Damon came up with as an appropriate response to pal Affleck's challenge. By AMNY.com Share on Facebook Share on Twitter Comments Comments section is temporarily on hold. Here’s why.