I'd like to see Bolt win the 400m, he could win 5 golds that way 100m, 200m, 400m, 4x 100m and 4x 400m. Now that would be a massive achievement. He is a freak of nature though, starting to wind up his run with about 70 m to go and still manages 20.0 something. He could break Michael Johnsons record by the looks of him.