The "1000 Birds" challenge in Modern Warfare 2 references the "Chidori" lightning jutsu performed by Kakashi Hatake and Sasuke Uchiha in the Naruto series. Chidori translates to "one thousand ...
Ah, a fellow Sasuke fan, we see. And why shouldn't you be? From the startlingly potent Chidori, inherited from the genius of Kakashi Hatake, to the scary, but also glorious Susanoo, our favorite ...