In order of scariness level:
1. Big hairy spiders. loving freaks of nature what the hell.
2. Random noises in the dark. It's never anything dangerous but boy do they get the adrenaline going.
3. Horror movies. Nightmares, paranoia, etc.
4. Little bald spiders. Freaks of nature but more laughable yet still super ugly.
5. Heights. Not super scary but I am not a fan of walking on glass floors hundreds of feet in the air, no matter how thick dat glass.
6. Whales. Anything super big underwater, really. But mainly whales.
7. Big man brothers. Pinky back door and whatnot.
8. Average brothers. Robbery and beatings.