Card carousel animation: cards flicked sideways on a tilted 3D plane. A rail of cards flicked sideways across a tilted plane. The cards do not crawl past on a loop — they are flicked: the rail leaves at speed, decelerates for well over a second and comes to rest about a card further along, the way a carousel behaves under a thumb rather than under a timer. The plane is not flat to the camera either. Measured on a recording's card edges, the horizontal scale grows 0.000825 per pixel of height about the frame's own centre line, so the foot of a card is a fifth wider than its head while horizontals stay horizontal and the type stays upright — which is why a row of plain rectangles reads as a surface receding into the frame rather than as a filmstrip.