Lorna's experiment worked, mostly. Mostly being the key word. She hadn't been expecting that much of a hit or a hit at all, there was after all, a chance this was a student. She could see the holes in her bubble, and what electricity had gotten through had to be bled off somehow, and the resulting energy cost her most of her t-shirt.
The patch job was hasty if only because she didn't know how much the next stroke would be for and didn't want to have glaring holes for the energy to arc through. Lorna Did Not Like electricity being shot at her.
Her ears were ringing so much she could barely hear herself speak, "I'm not going to hurt you..."