Circuit Judge's view of SCOTUS args

In A Judge's Guide to the Supreme Court Livestream, 3d Circuit Judge Marjorie Rendell explains how she listens to SCOTUS arguments:

As I listen to Supreme Court arguments, I try to concentrate on the questions the justices are asking to figure out their thought process. Where is he or she going with this? Is the justice pushing back on the lawyer, or on a colleague? Is he or she throwing a curveball, or a softball? Is the skepticism expressed by a particular justice real, or is he or she trying to get a reaction from the lawyer that will be an ah-ha moment for others?