I don't think he runs the longer distances. I think stability is a major issue, you can run a 400 because it's long enough to overcome the poor start, but you don't leave your lanes and have to jostle with other runners as in anything longer. I was curious if he ever had run a 800 and found
this website which listed a 1:40.18 time, but that has to be bull**** because it would have broken the world record by almost a full second and no one else is talking about it.