A Japanese teen broke and set a new Guinness World Record in July for "most revolutions in a single skip – rope skipping.” What happened: Kirato Hidaka, a 15-year-old student at the Kawanishi Junior High School in Yamaguchi City, Yamaguchi Prefecture, Japan, performed an impressive octuple-under in jump rope on July 17. The feat was reportedly observed by Ehime Jump Rope Association judges at the school’s gymnasium, according to The Yomiuri Shimbun.