In 2014, the music video for the band's single "Danger" garnered significant attention for its strong choreography; in particular, the neck-grab and shoulder move.[1] The subsequent remix of the single's Japanese version, with Vietnamese pianist Thanh Bui, marked the first time another artist appeared in a BTS music video. In 2015, the band began their BTS Universe storyline with the release of the "I Need U" music video.