So that was what it was called, earthbending. Bruce was new to that concept but it didn't surprise him at all. He was used to people having special abilities or powers that they could utilize on command. Well, actually most of the people he knew were some kind of superhumans...or billionaires or agents. Thor had powers like those but everyone else...well, maybe they were more humble about it since they relied on humanity as well as a series of skills.
At the threat, Bruce sighed, "I'm not mocking you, ma'am, but I don't think hostility and threats are going to get you and I anywhere. It's not a safe thing, is all." Bruce took a few steps back and held his palms up, a show that he was not trying to be threatening or take over what she was trying to do.
Rock didn't know that she was just as fragile as all of the rest of the rocks. So Hard Place would ensure that puny Earth would shatter like grass. And that was what had the scientist shaking from just a bit. The fear that she might truly understand that monster he had within him and he didn't want to have to show it to her. He didn't want to cause more damage or hurt anyone else.