And Derp is not wrong, she's just somewhat moody over how bad things are going. let's start with things she's failed to do. Steal something, hurt a hero, get a hostage, get away with something. On top of that she was been hurt, frozen and got a nice face-full of sidewalk just to have the heroes hang out around her and start talking to one another. Sadly Machina's words were just the last straw for Ember and she blew her top. I even did a dice roll to see just how angry she'd get and hit a nice net 20, poor things going to pull something.