KTFO means that the guy is flattened and unable to move for a minute to several minutes.
That shit did not happen to Anderson. So many Weidman nuthuggers up in here. Thanks for comin' out, though.
PS: Weidman did not convincingly win round one and was looking a couple steps behind Anderson until he landed the KO combo. You gotta throw the punch to land it, but that was luck combined with Silva's arrogance or Weidman was lucky that Anderson was that arrogant. Pick whichever you like.