Glad to know really important people share my foible:
The subject matter was extremely technical, and near the end of the argument Justice Ruth Bader Ginsburg dozed in her chair. Justices David Souter and Samuel Alito, who flank the 72-year-old, looked at her but did not give her a nudge.
P.S. Rav Nechemiah always said that he liked to have me deliver a drush on Friday nights at schule as that was the only time he saw me awake during the Rabbi's talk.