Yea, it was a big concert weekend indeed. Before he surprised Big Sean's hometown audience, Kanye West joined DJ duo TNGHT during their set in New York on Friday (November 30). Yeezy made an impromptu appearance on stage with TNGHT, aka producer/DJ Hudson Mohawke and Lunice, during their gig at Brooklyn's Music Hall of Williamsburg. The clip displays Kanye running on to the stage while the DJ duo play his track "Cold" (2:10). Although he doesn't have a microphone in his hand, he rapped the lyrics of the song, much to the joy of the attending crowd.