Goofs

As Nate descends down from the roof to join the team in the gallery the changing camera angles show the display case full of smoke hiding the two Davids. However, when the security system activates and the shutters are shown closing them in, the camera shows an aerial view of the team and a perfectly clear display case presenting the two Davids, but when the camera changes angles again the display case is once again cloudy.

Note: The display case is clear when Ian, Sterling, Maggie and the security team enter for the next scene for story purposes.

When the art gallery is open to the public, people looking at the two Davids are leaning against the case the statues are in. This would never be permitted at any art gallery or museum.

Nate eats popcorn while in the art exhibit. It's a great bit, but would never be allowed at a real museum.

As Sophie and Parker are checking their phones, they are both shown wearing the same ID tag; it reads "Joanna Nadler, Docent".

When Nate comes in from the roof into the museum right before the "robbery" takes place, and the shutters on the balconies close, there is nothing that would have automatically closed the roof skylight. The IYS security team could have just watched what the team did from the roof.