From My San Antonio:
"Heading into Saturday's race, Macon...had amassed almost 3,000 miles running in 2011, gone through a dozen pairs of shoes and logged roughly 200,000 miles in flying. He now has run 823 marathons during his lifetime."
The mere fact that he's able to get to one marathon to the next in such a short time frame is impressing. Paired with his ability to run up to three marathons in one weekend, and you could probably convince me that Macon is superhuman.