Continuity mistake: When Rebecca leaves the Museum after sitting in front of the Sacajawea display after Larry asks her to leave as he's closing up, from the internal shot of when she's leaving the Museum she exits through the middle rotating door but on the outside shot she is seen leaving from the door on the right hand side of the Museum.
Continuity mistake: When Nicky turns the stone, there's a close-up shot where a beam of light reflects on his face and he opens his eyes wide. A frame later, from a different angle, the beam is gone and the eyes are shut. Yet when the angle swaps to the previous close-up, the awe expression and light reappear.
Continuity mistake: When Larry "vanishes" the handkerchief and some is left on his thumb, after he says "vanishing" and holds the palms of his hands outward toward the Huns, we see a shot of the Huns, and we see Larry starting to turn his hands back around. However, a second later, when he says "into thin air", he is still holding the palms of his hands outward toward the Huns like before.