He might have beaten anyone and everyone over 100 and 200 metres, but Usain Bolt has a new challenger.
Demarjay Smith had the confidence to take on the World and Olympic champion...and he's only eight years old.
YouTube star Smith was a guest on the Ellen DeGeneres show, and was stunned to see his hero enter the studio.
There was no way he was going to pass on the opportunity to go up against Bolt in a sprint.
https://www.youtube.com/watch?v=Cow_MgriWz8
