As far as the limit of human speed, well we could find that out if Charlie and other coaches had a camp in the Nevada desert equipped with anything and everything that was necessarily to improve human limits. And mind you, anything would go in this venue, you know, sort of like the Harlem globetrotters but for track. I could see a sub 9 sec 100m and sub 19sec 200 EASY.
On a side note, why don’t guys do this? You know, form their own leagues and race against each other with no rules like street racing?! Look at how big AND 1 in basketball got and the underground MMA fighting! Dudes got mad TV time and a bit of cash to boot when they would tour the country!
As far as Usain, yea, within the guidelines of the IOC rules, a 9.4 SHOULD stand for quite some time. Although, I’m not too quick to count out Tyson Gay, that guy is relentless.