I just have to say, I really love the way a dragon's shadow can sometimes herald an attack. Like one time I was running along the road south of Lake Ilinalta when suddenly, without warning, the sun was blotted out and a shadow appeared on the road heading in the same direction I was; a dragon that had come from behind me without any roars or wings flaps to give it away. Or just today when I came out of the Riverwood Trader only to see a dragon's shadow pass across the roof of Alvor's house. For some reason I really like that shadow of impending doom.