Yes, that's what I posted above. Light travels immensely faster than a bullet. He saw the muzzle flash.
Yes. And if, as is likely, the assassins were using submachineguns (fully automatic weapons that fire pistol rounds, usually either 9mm or .45ACP), the bullets are just slow enough that a guy with great reflexes could duck when he saw the muzzle flash and barely get out of the way.
What I find curious about that whole affair is the aftermath when Rocco(?) states that he doesn't recognize the dead assassins, that they must be out of New York. Now, given the number of Mafiosi hitmen and similar associates not to mention the number of other ethnic hitmen, how could anyone think they would recognize them?
Probably more sloppy writing--unless Rocco somehow was aware of Michael's stormy meeting with Pentangeli and inferred that Frankie was behind the shooting and used his own men, some of whom Rocco might have recognized.
