WooooooooooooooRecord-breakers. Tianna Madison, Allyson Felix, Bianca Knight, and anchor Carmelita Jeter of Team USA took down a 27-year-old world record on their way to an Olympic gold medal in the 4 x 100m relay final. They clocked in at 40.82s, over half a second faster than the 41.37s record set by East Germany back in 1985.