The first time Darcy is on the roof (with Peter) she looks over the edge and we get a POV shot in which the camera pans down from the background to the grass directly below the building. In that shot we see a person in the background on a bicycle riding towards the school, and in the foreground we see a blue car driving off to the left. Later when Darcy is on the roof again (this time with Manny), we are treated to the *same* POV shot - only this time played in reverse! You'll notice the car and the person on the bicycle riding both going backwards.