Question that's always puzzled me about Frazier-Foreman I (first knockdown)

Some may think it a little picky but it's something I had to get off my chest - but hopefully there are some out there who actual have always thought the same thing as me - but ever since the first time I saw this fight it always puzzled me - FOR THE FIRST KNOCKDOWN (AT ABOUT 1:24 OF THIS CLIP) IT LOOKS FOR ALL THE WORLD TO ME LIKE FRAZIERS BACK LEG/KNEE ACTUALLY GOES DOWN BEFORE THE PUNCH ARRIVES???? (I've tried to slow it down and it just continues to look the same to me? - his leg bizarrely goes before the punch?? - i don't know maybe it's my eyes playing tricks on me??:huh It gives me the same 'hey??' feeling that Jack Johnson versus Stanley Ketchel gives me when you clearly see Johnson's leg dip down before the punch arrives - has anyone else out there ever thought that first knockdown looked a bit odd?

[ame]http://www.youtube.com/watch?v=W4-WjL8jIyQ&feature=related[/ame]

 

I know he'd taken some lumps before the last punch - but it just seemed strange to me that he seemed to not be hurt to the point of going down certainly - it was almost like he waited for George to go for the punch and volutarilly put his back knee down as he threw it not in response to it connecting with him??? :huh Is anyone else seeing this??:huh I don't know it's a strange one - i remember the first time I saw it many years ago - and i remember then going "ay?? He went to before the punch then??!" and my mate who was watching it went "yeah that looked a bit wierd?" Would love to get some more views on it - just one of those quirky things that has bugged me - and I think it everytime I watch this fight