Matt Damon could hardly contain his joy as he pranked random people, Jason Bourne-style, to raise money for his charity (Water.org). Damon turned strangers into spies by having them answer a random ringing phone and sending them on bizarre missions, which sounds like something people would never actually buy into, but luckily some did.
Much to the unadulterated glee of Damon, these newly-minted spies played along as he gave them instructions over a burner phone from a secluded room where he could giggle like a school girl while watching them on a live feed. You haven't seen Matt Damon this happy sans Ben Affleck pretty much ever.
At the end, the participants who stuck it out got to meet Damon and won tickets to the premiere of his new movie, Jason Bourne, which (let's be real), no one was really planning on seeing in the first place. Win-win for everyone.