Zombies, chain saw-wielding psychopaths and maniacal clowns popping out around dark corners in a creepy haunted house can leave some quivering in fright. But for thrill-seekers, being scared is one of the highlights of Halloween. Whether it's a horror movie or a haunted house, some people look forward to this rush of adrenaline, a hormone that can make one feel excited, alert and responsive. Here's how we get scared, and why some people love it. For more, click the link in our bio.