Matt Damon performs Ice Bucket Challenge with toilet water

Matt Damon has performed the ALS Ice Bucket Challenge by pouring a bucket of toilet water over himself.

In the video, the 'Good Will Hunting' star, who is the co-founder of a water charity called Water.org, revealed that he used toilet water for the task as there are about 800 million people in the world who don't have access to clean water, so the idea of it "seemed a little crazy", Contactmusic reported.

The 'Bourne Identity' star, who was challenged by Ben Affleck, said that he decided to use toilet water to highlight the importance of sanitation and the scarcity of safe drinking water across the globe.

Damon has nominated George Clooney, Bono and American footballer Tom Brady, to take the challenge.