In fairness to McD, that pass to Tyreek on the sidelines was pretty bang-bang. Even in the broadcast when they showed the replay from the better angle, you did a double-take, seeing the bobble, but Miami was already snapping the ball. I don't think if they spotted it upstairs, they could flag it quick enough. It's one thing for fans at home to see things with multiple TV angles and slow motion, but game speed is quite different.