Yes, hills are exhilarating, however my goal has always been to make it to the bottom alive! I have this fear that a wheel is going to go flying off or that I will somehow "lose control" and crash. Neither, of course, has ever come close to happening, but that's how the mind works. I increasingly go faster and faster over time. The fear has to do with my inexperience and if I have to make an evasive move and I'm going fast I might just feel the need to slam on my brakes (even if that's not the best thing to do). I just don't want to fall.