Why the Human Mind Jumps at Unexpected Movement

Person flinching at sudden movement in peripheral vision, showing the brain's instant startle reflex to unexpected motion.

The brain’s lightning reaction to sudden motion—and why it’s so hard to suppress A shadow flits across the window, a bird bursts from a bush, a hand suddenly waves near your face—and before you can think, your body flinches. Shoulders hunch, eyes blink, heart jumps. This reaction isn’t childish or oversensitive. It’s the human startle … Read more