The TERRIES wear bow ties and the FIRMIES wear neckties.
They live below the ground and are responsible for earthquakes.
The Terries cause earthquakes by rolling in massive groups of thousands underground against the giant pillars that support the land. The Fermies cause earthquakes by gathering together in massive numbers and lifting up pieces of the earth's crust.
Somehow Disney got involved as did Scrooge McDuck or so I read. Now except for the Mugger who told me about Terries and Firmies (you know who you are) did any of YOU know that? I didn't have a clue.