This first video is a fairly old account of two European guys who managed to illegally BASE jump off of the then incomplete Burj Khalifa, formerly the Burj Dubai (this is from May 2008 I believe); the video footage they captured during their "flights" is unreal.
Then in January of this year, two guys were given official permission to jump from the building, although I think the above video is cooler 
Old news perhaps, but still pretty cool 
I don’t think anyone seriously expected that would happen…
As was kindly pointed out in the comments, this is a clip from a commercial, but I think it’s much more humorous when taken completely out of context.
http://www.youtube.com/watch?v=6nccOvuYErk
