In what will very likely come to be an iconic Olympic moment, Chinese track star Liu Xiang finished his heat 100 meter hurdle heat on one leg after re-aggravating the achilles injury that forced him out of Beijing in 2008.
Xiang pulled up lame after the first hurdle, got up, and made a beeline for the tunnel, refusing the wheelchair offering to him as he hopped away.
But then Xiang stopped halfway down the tunnel and turned back towards the track. Still on one leg, he hopped the length of the homestretch, stopping to kiss the final hurdle before crossing the finish line.
We've seen a few unforgettable moments in London that will be talked about for years to come. We saw Mo Farah become the first British athlete to ever win the Olympic 10k. For the first time in history, the four fastest men in the world squared off in the 100 meters. The British gymnastics team took an unprecedented bronze medal in the team competition.
Liu Xiang's determination that he would finish an Olympic race no matter what will be one of those special moments.