A social experiment on YouTube that's gone viral is all about karma.
YouTube user Big Daws is usually all about pranking people. But his most recent video sets out to address the issue of homelessness and acknowledge the generous nature of people who give back.
In the video, Daws pretends to be a homeless person on the street.
He then gives their money back -- plus $20 -- to every person who stops to help him. Their reactions are worth watching alone.
Check out the video below or by tapping here: