Wayde Van Niekerk uses water gun... Its super effective!!! He looked super effective tonight winning easily with a cool 43.98. 😎 He will return shortly to run the 200 hoping to be the first man since Michael Johnson to win the double at a World Championships. #London2017 #WorldChampionships #RoadtoLondon #TrackChampionships #TrackandField #TrackNation #Sports #SportsPhotography #TrackNation #FloTrack #RunnerSpace #Dyestat #Athletics #IAAFWorlds #waydevanniekerk #400 #iaafworldchampionships2017 #canon1dxmarkii #Canon300