Felix Savon's amateur KO vs David Tua. Savon throws a short right hand, that clips Tua right on the chin, and Tua couldn't recover from it. It didn't look like a particularly big shot IMO, it was thrown from quite close and didn't appear to have great leverage on it. Tua was also an iron chinned fighter, and in headgear against very padded gloves, you wouldn't have expected him to be knocked out, Savon wasn't a huge puncher himself. [ame="http://www.youtube.com/watch?v=cRvcwkJn_rQ"]http://www.youtube.com/watch?v=cRvcwkJn_rQ[/ame]
Vitali vs Herbie Hide. Hide's eyes were glazed over when he tried to get up, but the shot that hit him, looked as though it barely landed.
Ottke vs. Mundine. Looks like it wouldn't even hurt you, more like a push than a punch and it knocked him clean out. What made it better is that the ref stood over Mundine and counted to ten whilst Mundine was clearly completely out of it. What made it even better still is that Ottke is one of the most feather fisted fighters you can imagine.