When the hawk dives down and flies away with the ring, you notice that Tim's left hand is closed and remains closed until the end of the scene. It turns out that the bird did not take away the ring.
When Arwin talks with Moseby in the lobby; in one shot- there's a man standing in the way background looking, as if he's looking at the acting in progress; and then in the other shot of Arwin, a man quickly hides behind something to get out of the shot.
When Moseby talks with Arwin in the lobby; in one shot- there's a man standing in the way background staring, as if he's looking at the acting in progress; and then in the next-next shot of Moseby- (another) man quickly hides behind the wall to get out of the shot