Factual errors: The cattle gun used to blow the cylinder out of the center of the lock is not possible as shown in the movie. If the center of the lock was blown out, the bolt that secures the door to the frame (the large steel piece that slides out of a lock when you turn the key on a deadbolt) would still remain in place, and would still remain securing the door to the frame. Simply blowing the cylinder out would not be sufficient for quick or easy entry it would simply eliminate the need for a key. One would have to be able to fit a tool or their finger into the hole that was created and somehow pull the bolt back into the door, or possibly have to rotate the entire mechanism inside of the lock housing, as you would with the rotation of a key - and therefore ruining the element of surprise.
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