Here is an amazing KO on Ruslan Karaev by Melvin Manhoef at K-1 2007 in Amsterdam. I teach this combo (cross, hook, round kick) all the time in my classes and I think a lot of students gloss over it because it is not necessarily a "sexy" combo. Yet here is another example of the basics working and working WELL!! Ruslan did not return to the ring for over a year! His head snaps so frickin' hard from Manhoef's hook. Almost imperceptible, but Ruslan drops his right hand just a smidge and Manhoef went right through it and Ruslan's chin.
Thanks to Head Kick Legend for the clip!
Keep your hands up,