World champions failed to qualify for final

It is very sad to see both world champions, Tyson Gay and Liu Xiang failed to qualify for final in 100m and 110m hurdles respectively.

During the 100m final, I wonder why I didn't see Tyson Gay in the final list. At first, I thought that he most probably pulled out from the race due to injury. The reason why I was thinking that way is because I have never see any world champions failed to qualify for 100m final in Olympic Games unless injury. I only found out later that he actually only finished fifth in his semi-final with a poor time of 10.05 seconds. However, Jamaican Usain Bolt had again make the world crazy as he made his sprint looked so ridiculously easy in the final with the world record of 9.69 seconds.

Things also didn't go so well with Liu Xiang as Liu slipped off the blocks himself and later pulled out from the event entirely. This is most probably the biggest upset of the Beijing 2008 Olympic Games for host country China.