▁his ▁Commonwealth ▁title ▁in ▁Victoria ▁in ▁his ▁second ▁fast est ▁ever ▁ 1 0 0 ▁m ▁time ▁of ▁ 9 . 9 1 . ▁ ▁Def ending ▁his ▁Olympic ▁title ▁in ▁ 1 9 9 6 , ▁Christ ie ▁was ▁dis qual ified ▁in ▁the ▁final ▁after ▁two ▁false ▁starts . ▁He ▁said : ▁" The ▁first ▁one ▁I ▁knew ▁I ▁did , ▁but ▁on ▁the ▁second ▁one ▁I ▁felt ▁I ▁react ed ▁perfectly ▁to ▁the ▁gun . ▁I ▁have ▁never ▁been ▁dis qual ified ▁from ▁a ▁race ▁before ▁in ▁my ▁life . ▁What ▁a ▁place ▁to ▁do ▁it ." ▁His ▁reaction ▁time ▁was ▁ 0 . 0 8 6 ▁seconds . ▁Under ▁I A AF ▁rules , ▁spr inter s ▁are ▁not ▁allowed ▁to ▁start ▁from ▁their ▁blocks ▁faster ▁than ▁ 0 . 1 ▁seconds . ▁ ▁Christ ie ▁retired ▁from ▁representative ▁international ▁competition ▁in ▁ 1 9 9 7 , ▁although ▁he ▁continued ▁to ▁make ▁appearances ▁at ▁inv itation ▁meet ings . ▁ ▁Al leg ations ▁of ▁do ping ▁and ▁ban ▁Christ ie ▁faced ▁an ▁International ▁Olympic ▁Committee ▁discipl inary ▁hearing ▁at ▁the ▁ 1 9 8 8 ▁Se oul ▁Olympics ▁because ▁of ▁an ▁ad verse ▁drug ▁test ▁for ▁the ▁b anned ▁stim ul ant ▁pseudo e ph ed r ine ▁after ▁he ▁ran ▁in ▁the ▁he ats ▁of ▁the ▁ 2 0 0 m . ▁He ▁escaped ▁san ction ▁after ▁the ▁committee ▁voted ▁by ▁a ▁margin ▁of ▁ 1 1 ▁to ▁ 1 0 ▁and ▁gave ▁Christ ie ▁" the