When Gus pulls at the note in his dead boss's hand, it immediately pulls out and he has to put it back to try and pull it out.
In the scene where Woody is tied up in the Psych office, Gus throws some Cheese Trumpets at Woody to feed him. A few land on his chest. When the camera cuts to the next angle the Cheese Trumpets are gone. As the scene progresses the food appears and disappears.
When Woody tells Gus and Shawn he'll keep their secret, he puts his hands on their shoulders. Shortly after he pulls them off, but in the next shot his hands are on their shoulders again.
At the beginning Shawn wakes up in bed with Juliet but at this point in the season they were still not sleeping together. However, later in the episode Juliet claims it was "a one-time thing."