Okay I'll be the pedant here. Singular doesn't mean "Only" or "Single." It means unique or exceptional. The submitter's use here works even if it's not THE best or THE only moment of this level of humor.
I get to meet Ben Jones (Cooter) once when i was a kid. he was just getting into politics and was touring Georgia campaigning in the General Lee. I was sooo stoked to see that car. I was 5.
this is not Colberts best work but a fine example.