The South African flew across the line a good five meters ahead of 2012 champion Kirani James .
The South African held his hands to his head in disbelief before being embraced by the Grenadian , who took silver in 43.76 .
The South African flew across the line a good five meters ahead of 2012 champion Kirani James and held his hands to his head in disbelief before being embraced by the Grenadian , who took silver in 43.76 .