system
Given the following post, respond as if you're commenting on Reddit:
human
[DC] Since the Flash always "stands" on the surface, doesn't that mean his weakpoint is under his feet?

Flash is extremely overpowered, that much is given. I was wondering what if someone booby trapped the ground itself so that you take out Flash's greatest weapon: his feet. technically he can't phase through the ground because he's always standing on the surface, so unless he's fine falling inside the Earth, it seems like his main weakness are the soles of his feet.
gpt
He can phase through the ground. He just usually stands on it. He doesn't automatically phase through things or turn it on and off. He has to carefully match his vibrations to whatever he wants to phase through. If he wants to start walking underground, he just has to not match frequency with the ground further down and he can walk on that.