that has legos on it rolling down the hill after these guys. >> that's right. it wasn't created by a computer or shot in front of a green screen. but it also wasn't just a group of friends joke around. >> it had viral video advertising campaign. wafting off of it. >> that's exactly what it is. a viral video promoting what was in 2008, a new lego indiana jones video game, from lucas arts. >> we wanted to find a way to brawn the audience. we tasked our agency to come up with some new idea. getting people talking the next day. >> what's more different than a giant lego boulder chasing someone dressed like indian jones down a hill in the middle after major american city? but still, with 5 million lego bricks, that's got to be a little heavy. >> really heavy. and they are sort of moving it like it was nothing. i was like 5 million legos.