I'm going to make this very, very clear if I can. I didn't look at when the clock started, and I only used the tenths of a second ticking down to make sure that it took three frame advances on my PVR to equal a tenth of a second. From the moment he touched the ball to the time the ball left his hands was less than 12 frame advances, which would equal four tenths of a second. Whether the clock started late or not isn't relevant, because he'd still have gotten it off if he had. I probably rewound and did the same thing several dozen times trying to find a way to invalidate that shot in some way.
Fish did not pause, he did not collect the ball, he did not gather himself. Payton hit him in the perfect spot and he caught the ball and shot it in the same motion.