West shot the American Pyscho-themed footage with reality Tv star Scott Disick, who is dating Kim Kardashian's sister Kourtney, as part of a promotional campaign for Yeezus.
The video parodied a scene from the 2000 movie starring Christian Bale, and it has now emerged the author of the book on which the film was based wrote the script for West's promo.
Ellis tells MTv.com, "Kanye came to me and asked me to write it, so I wrote the promo. I just got a text one day... it said, 'It's Kanye, do you have time to rap?' And then suddenly my phone rang and someone said, 'Kanye got your number and he wants you to write this promo for Yeezus'. And so we went back and forth on it and he wanted it done, like, that day. So I wrote it very quickly and they shot it two or three days later."