"If it will set your mind to ease, I will not." It is an easy thing to say, since even without her asking he would not be inclined to in the first place.

"It is a radioactive substance," he says as a reminder, even as he notes her mention of speedsters. He is aware of Bart and Barry's presence on the turtle, and their abilities. "Given time and proximity, it would have a detrimental effect on any organic life if it is not sufficiently shielded."