This blog post puts together references from commentators that compare current performances to past great ones. The video clips are on youtube, I’m sure it took a lot of work and its well worth a visit. Some of the clips include the first perfect 10 in Olympic gymnastics history by Nadia Comaneci on the uneven parallel bars, After his hamstring popped in the semifinals of the 400 meters at the 1992 Olympics, Derek Redmond, aided by his father, finished the race to roars from the crowd.