Having finally seen the fight and the supposed "flash knockdown" I fail to see how that should have been scored a knockdown...

He may have a suspect chin but I just didn't see it in this fight...Anyhow, here is the clip. Happens in the 7th round at the 2:00 mark...Can anyone tell me exactly what punch it was that cause the flashknock down? After seeing it a few times, it seems he was just barely glazed on the side of his cheek and his footing got caught in the ropes. He didn't look hurt AT ALL...he came back pretty hard actually and the French guy was on the defensive before the ref broke it up...Is it just me or am I missing something here

http://www.youtube.com/watch?v=blrlfXV1MgM