For everyone else who may be interested in seeing a punch before it's actually a punch. You can see Floyd Mayweather react before the punch becomes a punch. You'll need to watch it in slow motion because you have to look for 2 things at one. The movement before the punch and the punch itself. You can see Mayweather keep his eyes on his opponent, he doesn't block much of his field of vision which allows him to see a lot of movement. You'll also see reactions to a punch that they see coming but don't have enough time to get out of the way. Sometimes the reaction is just a brace for impact reaction, where the eyes squint in preparation for the impact. You'll also see examples where the brain doesn't perceive the punch as a punch.