Cameroon's Idrissa Adam (Top) picks up an injruy while running next to (L to R) Nigeria's Ogho-Oghene Egwero, Jamaica's Usain Bolt and Britain's James Dasaolu during round 1 of the men's 100m heats at the London 2012 Olympic Games at the Olympic Stadium August 4, 2012. REUTERS/Max Rossi (BRITAIN - Tags: OLYMPICS SPORT ATHLETICS)