21 Jump Street - See Saw Swap
In the second season episode "Two For the Road" near the end, Hansen meets TJ at a playground. As Hansen walks up, the camera angle is from his point of view as he passes a row of see saws. All of the see saws are in the same position...the ends closest to TJ are up in the air. But when the camera angle shifts to show Hansen, the same see saws are seen over his shoulder and they alternate position (the first one has the close end up, the second one has close end down, etc).