Continuity mistake: At the end of the episode, we are shown a video of Dwight getting splashed with the milkshake from the point of view of the guys in the car. But it splashes differently the two times we see it. The first time it hits his lower body, and on the video, it hits him in his upper body.
Continuity mistake: Nellie and Pam are driving along, discussing what to make up about people's ancestry. Here, we see the same background go past Pam, a driveway with a black SUV on the right, and a white SUV on the left. This shot is only repeated in the angle where we can only see Pam, and the view out of the passenger side window. The car is driving along as normal, we see the two cars on the driveway, and then the car turns a corner, and we see the same shot all over again.