All right, this is pretty good. Jimmy Fallon and Justin Timberlake, best known for their must-watch "History of Rap" collaborations, walk us through the history of end zone celebrations. They begin with familiarities like The Ickey Shuffle and The Dirty Bird, and from there segue into ... well, just watch. Best parts include the tributes to a pair of ex-Patriots and the new spin on The Spin. Enjoy.