Stashed in: Best Videos, Will Smith, Mashups!, @katyperry, Bob Marley, Nirvana!, A Cappella
Here is his Dark Horse one:
The Facts of Life (Layer Cake Speech) - YouTube
Cats and Dolphins living together!
Why "Deliberate Practice" Is The Only Way To Keep Getting Better | Fast Company
Beastie Boys' "Sabotage" reenacted with librarians - Boing Boing