Amelia Hunt, a neuroscientist with the University of Aberdeen in Scotland, says the standstill (nicknamed the stopped-clock illusion) occurs because our brains anticipate what we will see before we actually view it. When we move our eyes, everything shifts position on the retina. If we couldn't sense those adjustments coming, we'd be incredibly disoriented. So our brains figured a way to cope: As we navigate the world, our visual cortex creates and updates an interactive map of what's around us. The brain uses it to predict what we'll see to prevent discombobulation.