In ROCH, Granny Sun suddenly launched a sneak kick at Hao Datong. Hao Datong reacted innately by blasting Granny Sun to death. It was said that Xiao Longnu had followed Granny Sun and seen her every move, but was not fast enough to save her.
Well, at that time, Xiao Longnu hadn't reached the peak of perfection in speed. In HSDS, the Yellow-dressed Lady saved Xie Xun when everybody else thought it would be impossible.
Could anyone have had the speed to save Granny Sun? Could they have launched a projectile perhaps?