Gabby Thomas motored around the wet curve at the Stade de France track on Saturday night, during the women’s Olympic 4 x 100m relay final. It was the same curve she blitzed on Tuesday night while winning the individual 200-m gold, but this time, rather than go full-stop to the finish, her task was to pass the baton to Sha’Carri Richardson, the other superstar women’s sprinter for Team USA.