Linda Blair has a blemish on her chin (partly camouflaged by makeup) that appears and disappears between shots.
They're on Fantasy Island, everything bears that name to remind everyone where they are, yet, time and again, when an anachronistic character shows up, such as King Arthur here, and goes to a bar, or the dinning patio, the patrons are laughing when he walks in or tells them who he is. Yet, everyone who comes or lives on Fantasy Island already knows about people going there to fulfill fantasies, so it shouldn't surprise anyone.