She hears you take off and spins around to blast yet again. She had opened fire with the expectation that you were shooting directly for her; you, however, were going for a spot a few yards south of her position, where you had impacted the ground before and left those drag marks. Her blast whizzes by overhead, obliterating the wall behind you. You roll out a couple of times as you land, your hands and feet carving out more of the floor as you dragged to a stop. Two messy rectangles were now carved into the floor beside you, just as you'd planned. And so, thrusting both hands into the corners of the shapes, you pull. Both rectangles pull out into huge, heavy slabs of stone, ready to use as you saw fit. And you had plenty of uses.