Talking about a location with a map showing where it is, then revealing that the audience doesn't know geography / the place is not well known, because the map was wrong.

Can't find a good video but it's the one where he names a country and places its name on a world map. Then shows that it wasn't that country at all to show his viewers are bad at world geography.

That was a terribly unfunny explanation by me. But I like the bit.