HYDEL High School's hurdler Robert Miller was the standout performer on yesterday's second day at the JAAA Puma National Senior and Junior Championships inside the National Stadium.Competing in the Under-20 boys' 400m hurdles, Miller led from start to finish, winning in an impressive personal best 49.96 seconds. In a close finish for the minor placings, Jahvanie Turell of Kingston College held off Joshua Wint of William Knibb High for second as both athletes clocked personal best 50.27 seconds.