In a suit between the drivers of two cars involved in a collision, the plaintiff's attorney calls a witness to the stand. On direct examination, the witness testifies that, while walking down the street, she heard a horn sounding, looked up, and saw two cars enter an intersection and collide. On cross- examination, the defense attorney goes over the same ground with the witness. He asks her whether there was any broken glass on the pavement, to which she responds, "Yes, lots of it," and before the defense attorney can ask his next question, the witness blurts out, "They had to be going over 50!" The defense attorney moves to strike the statement. How should the court rule?