Continuity: When Nick pulls up to the construction site in his pick up truck, the truck comes to a complete stop in the wide shot. In the close-up on the opposite side of the truck, it's still moving.
Continuity: In the scene where Nick first decides to have Mabel committed, he's got a towel on his shoulder and a bottle of gin in his hand. The next cut contains the towel, but no bottle of gin. The following shot the gin returns.