WvN could have hung on in the 800m, passing 400m in 54 seconds and hanging on desperately to Rudisha, then blown by him at the very end. WvN is listed at 6ft and 154 lbs, so he does not carry much weight for a long sprinter. Of course, with WvN in the 800m, perhaps somebody would take it out harder and he would lose. But it appears that WvN could run 1:45ish currently, but maybe that would be close to his current limit.