\\\"his ad-lib comments showed poor judgment\\\"
\\\"an extemporaneous piano recital\\\"
\\\"an extemporary lecture\\\"
\\\"an extempore skit\\\"
\\\"an impromptu speech\\\"
\\\"offhand excuses\\\"
\\\"trying to sound offhanded and reassuring\\\"
\\\"an off-the-cuff toast\\\"
\\\"a few unrehearsed comments\\\"