Continuity mistake: There are only two missing pieces to complete the jigsaw puzzle, and the perimeter/frame is intact. After the pastor turns the puzzle around to face Eden, there are four pieces missing, three of which are perimeter pieces. (00:04:38)
Continuity mistake: Billy pokes Wally toward the end of the plank until Wally's left boot tip is over the edge. When the camera returns to the plank, both of Wally's feet are 1-2+ feet away from the end. In the next camera shift, Wally's feet are at the edge again. (00:13:20 - 00:13:55)
Continuity mistake: Eden is holding the match almost straight up. When the camera returns to her, the match is at about a 45° angle and the flame is much smaller. (01:09:36)