ya ' s ▁Vincent ▁M um o ▁Ki il u ▁was ▁box ed ▁in ▁near ▁the ▁back ▁of ▁the ▁pack , ▁with ▁South ▁Africa ' s ▁Of ent se ▁M og aw ane ▁on ▁his ▁shoulder . ▁ ▁Com ing ▁into ▁the ▁home ▁straight , ▁Ki il u ▁tried ▁to ▁step ▁to ▁the ▁outside , ▁tri pping ▁M og aw ane , ▁leaving ▁him ▁injured ▁on ▁the ▁track . ▁ ▁The ▁much ▁await ed ▁return ▁of ▁Oscar ▁P istor ius ▁waiting ▁to ▁run ▁the ▁third ▁leg ▁never ▁material ized . ▁ ▁South ▁Africa ▁file d ▁a ▁protest ▁in ▁which ▁Ken ya ▁was ▁dis qual ified ▁and ▁South ▁Africa ▁was ▁allowed ▁to ▁run ▁in ▁the ▁final . ▁ ▁Con ven ient ly , ▁the ▁London ▁Olympic ▁Stadium ▁track ▁has ▁ 9 ▁lan es ▁to ▁accommod ate ▁such ▁a ▁circumst ance , ▁while ▁normally ▁only ▁ 8 ▁lan es ▁are ▁used ▁in ▁Championship ▁meets . ▁ ▁At ▁the ▁finish ▁of ▁the ▁first ▁heat , ▁Tr in idad ▁and ▁Tob ago ▁won ▁the ▁heat , ▁setting ▁their ▁National ▁Record , ▁but ▁host ▁Great ▁Britain ▁was ▁given ▁exactly ▁the ▁same ▁time . ▁ ▁In ▁the ▁second ▁heat ▁the ▁United ▁States ▁led ▁off ▁with ▁M ante o ▁Mitchell . ▁ ▁Half way ▁around ▁the ▁track , ▁Mitchell ▁heard ▁a ▁crack ▁and ▁felt ▁pain . ▁ ▁Mitchell ▁continued ▁to ▁the ▁hand ▁off , ▁running ▁a ▁sub - par ▁ 4 6 . 1 ▁split . ▁ ▁It ▁was ▁later ▁revealed ▁that ▁Mitchell ▁did ▁break ▁his ▁left ▁fib ula .