Continuity mistake: The rememory recording headpiece has a single button on only one side, which lights up when activated. While Sam is with Todd he listens to Todd's history, and when Sam activates the device he holds the headpiece out for Todd to "prove it." In the first shot Sam's holding the side with the lit-up button, but in the next shot the headpiece is turned the opposite way, with the lit-up button facing Todd as Sam's holding the other side of the headpiece. (01:10:35)
Continuity mistake: At the end, when Sam places the last few mini figurines on the hex riser display, note the house's chimney stack faces to the right, but when Sam picks up the display the chimney faces to the left. There are some other difference between these shots, such as the miniature tree under Dash's car goes from full green foliage to sparse, then back to full. (01:45:40)
