I keep thinking about "Enter Flashtime", and how nonsensical was Barry's line, "You're my lightning rod, Iris." Generally, we call someone a lightning rod FOR something that they seem to attract. It's pretty much the same as calling them a magnet for something, but "magnet" is used for good situations (like calling a man "a chick magnet"), and "lightning rod" is for bad ones (like "He's a lightning rod for trouble"). How is Iris supposed to be Barry's lightning rod? To me, it just seems like a contrived phrase that the writers used because they had to have SOME way of having Barry say "lightning rod", so as to prompt Iris to come up with the solution. The episode was terrific - except for that one troublesome line.