The oral argument in Ultratec, Inc. v. CaptionCall, LLC is a good example of a hot bench, Federal Circuit style.
The oral argument is available here:
Judge Moore’s opinion for the court is available here: [Link].
If you note the 1:08:20 mark, the attorney for the Solicitor’s Office references examples of proceedings of the Board that she has listened in on. I thought that was curious. One normally does not think of the Solicitor’s Office as listening in on PTAB proceedings.