Macca's makes you chase freebies

DDB Stockholm have an interesting approach to handing out freebies for McDonalds. The digital billboard gives people walking by the chance to take a photo of an item from McDonalds and take it in store to get it free. The items are an apple pie, coffee and a sundae. I managed to watch a video of how it works on ad age, but can't get back into the link anymore. Its also on creativity online on their pick of the day. You might think its simple to get it, but if you manage to catch a glimpse of the video, you will see they actually move very very VERY fast.
Theres a link to it on Ad age http://adage.com/bestads/ if you scroll down, but it just leads you back to creativity online, where you have to pay to watch it! come on!!!