Board Thread:The Flash discussions/@comment-13895380-20151024171607/@comment-27700324-20170313125912

When it comes to his reaction speed, i always considered it like the spider sense. He can use it, but he doesn't always. So Captain Cold is shooting at him. He would presumably try to avoid, however heightened perception only works when you are going super fast and not while you are just standing still. That is why Barry made Snart and Rory look like Stormtroopers in earlier episodes, but in this one he is taken out.