Continuity mistake: Throughout the episode, the "Pink Amigo" sign changes. Sometimes the word "Restaurant" is on top of the whole word "Pink", other times it begins after the "P", in other shots it's absent.
Continuity mistake: As Dave is leaning over the edge of the air boat with Rose behind him, he pulls a chunk of metal out of the water and places it on the edge of the boat on his left side. When he gets up from his lying position moments later, the metal is gone. Moments later again, with an overhead shot of the boat, we see what appears to be that piece of metal positioned at what would have been his right side, not his left. This is also where we see him step over the seat (twice!) in subsequent camera angles. (00:30:00)
Continuity mistake: When the kids in the chorus become possessed by the ghosts and run out of the room, Juniper is standing alone by the piano, still wearing the chorus robe. In the next shot, the chorus teacher is now standing next to her, and she is not wearing her robe.
Continuity mistake: At the guest house in the mountains, Lola puts an opened beer bottle on the kitchen bench. When we see the bench again, the beer bottle is not there, and then, later, the other woman picks up the bottle, wipes the bench and puts the bottle on a coaster.