Jamie was enjoying the park when their friend shouted, “Look, a scary spider!” All of a sudden, Jamie couldn’t see anything else—just that spider. Even the barking dog disappeared. Our brains can be like flashlights: they highlight what we’re thinking about and hide other things. If you're worried or excited about something, that’s where your attention goes. But sometimes, the brain focuses too much on one thing and forgets the rest. That can make us miss important stuff around us. Take the quiz to find out what’s really going on here.