fedor has forgotten he is not a knockout artist
Fedor is one of those guys though who hits much harder than people expect. Watch every fight he's ever been in almost, and you can see the surprise on his opponents face once he lands a solid shot.
It's almost like his punch is more of a stun. He might throw it right away, or he might throw a few softer ones then HERP WTF was that?! /rear naked choke