Sideshow performers are a type of entertainer that typically perform in circuses, carnivals, and other sideshows. GEEKS, Fireeaters, and Swordswallowers are all types of sideshow performers. GEEKS are performers who bite the heads off of live animals, such as chickens or snakes. Fireeaters are performers who swallow and breathe fire. Swordswallowers are performers who swallow swords or other sharp objects.