Most of the worst shots Cleverly took were to the back of the head; "HOWEVER" it's his own damn fault for covering and ducking down exposing the back of his head.
Kovalev is a killer, and one of my favorite right now, but he was really lucky that he wasn't dq'ed for hitting Cleverly while he was on the floor.
The comparison bvetween Mitchell and Cleverly seems about right to me. That was a destruction which had me laughing my arse off throughout. MTF