Cassie doesn't need the warning, but it's nice knowing she isn't alone. She has about a second to appreciate that and wonder if she ought to make herself bigger -- easier to stomp on it, or easier to get hit? -- when the javelin destroys the robot, and she doesn't have to make many decisions at all, actually.

"Thanks." She carefully checks to make sure the coast is clear before she makes her way over to the fourth year she recognizes as Sif.

"What is this? Are we under some kind of attack? Is there an emergency?"