Here's something weird, and interesting: Jumpy people, those who are easily startled, are much more likely to be politically conservative! And since political conservatives tend to be religious conservatives, it's probably true that people who are easily startled are more religious, too.
Many have claimed there's a genetic factor to religion, maybe this is a symptom? Those who are easily frightened may be more inclined to look for supernatural explanations? I don't know, it's just interesting.