Why Bolt shock could be good for London
Usain Bolt's dramatic disqualification from the 100 metres final will place the International Association of Athletics Federations (IAAF) under intense pressure to reconsider its one false start rule.
When the governing body finally introduced the law last year - plans to bring it in in 2005 had been thrown out by IAAF president Lamine Diack - there were many critics who felt it was simply too harsh.
Had Dwain Chambers and Christine Ohuruogu been the only athletes to fall foul of the rule, then the IAAF would have probably moved on quietly. But when your gold-plated, number one global superstar is denied the chance to produce the sort of exploits athletics so desperately needs to grab the world's attention, then that's another matter altogether.
These championships were already struggling to get the profile they deserve and once enjoyed (holding them every two years is actually the biggest self-inflicted handicap). Remarkably, local organisers failed to sell out the Daegu Stadium for the night of the mens 100m final even though they had already reduced its capacity from 68,000 to 45,000.
But while some will accuse the IAAF of shooting itself in the foot for introducing them in the first place, changing their rules on the back of Bolt's disqualification would be a disastrous overreaction.
Sport needs to have unpredictability of outcome and few can deny that Sunday's action delivered that. Sport also needs clear sets of rules, which, whatever they are, need to be the same for everyone - whether you are Usain Bolt or a young Jamaican sprinter competing in the national schools championships that helped hone his talent.
And while Daegu and IAAF officials might be feeling the heat here, Lord Coe, chairman of London 2012, watching from his IAAF vice president's seat, might have allowed himself a small, private smile.
Bolt was already the biggest draw at an Olympic athletics meeting that will be sold out. Who on earth wouldn't want to see him try to atone for his Daegu error in London?