A circle of missing image data smoothly wandering around the film could be imagined as the result of a worm taking a wiggly path as it eats through a stack of frames.

• 假设有段影片缺了一块圆形的影像资料，而这块区域在影片中平滑地徘徊，这个移动路径可以想像成一条小虫在吃掉一叠影格时，左右摆动前进的路径。