Originally posted by RtxgenSuperman had attosecond reflexes according to that writer too and he casually matched Barry in that scene.
Well the problem is that using Wally or even Barry's best feats would put them above the rest by a large margin. Wally had outran the Big Bang and Barry had reaction time at less than an attosecond, more than 1 billion times the common nanosecond reaction heralds might have.