As you've probably noticed, the #IceBucketChallenge benefiting ALS research is widely popular now. Friends challenge friends to dump buckets of ice water on their heads and donate money for ALS research, but Matt Damon might have done the best one yet.

As co-founder of, Damon advocates for the clean water initiative across the globe, so dumping a bucket of clean water on his head seemed like a waste sense so many people in the world don't have that luxury. Therefore, Damon added a twist to his video when nominated by Jimmy Kimmel and Ben Affleck.

Watch this video to find out why his #IceBucketChallenge is so unique: