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Karsten Warholm smashes 400m hurdles world record and celebrates with Superman shirt-rip
Daily Star's biggest headlines straight to your inbox!Norway's Karsten Warholm obliterated his rivals to win gold and break the 400m hurdles world record at the Tokyo Olympics - and then produced an iconic Superman celebration. The 400m hurdles was billed as one of the standout events of these Games, and it certainly didn't disappoint.