You see, all it takes is one photo and an ingenious idea to spark this viral trend. As the story goes, a guy in Ohio took a photo posing next to a girl giving a thumbs up. The photo was quickly taken down because apparently she didn't like it (honestly, I thought she was a stock photo, fake human being) but his friends got a hold of it before it was down and, well, you know how zany and mischievous friends could be. Then a man named Paul Weber saw the photo and he got his co-workers involved, each of them taking photos with the previous photo. What resulted is below.
And so on... Posting every photo would be laborious, so I'm not going to do that but see how they all come together in the video below. It's freakin' magical, man!