Angel vs Spider
Castiel is an Angel of the Lord. Not afraid of anything. A celestial being of great powers and a soldier who's fought and won battles in his long life of thousands of years. To the humans around him he's all but immortal. To many of his angelic brethren he's a devout leader.
But here he is. Brand new on this Earth. Frozen where he stands. Unsure… shaking with something he doesn't understand.
He glares at the ugly creature on the wall. A second ago it came crawling towards him on eight crooked and hairy legs. From where it now pauses it eyes him up. Will it jump him? The idea is ridiculous, but he fears the possibility all the same.
Why? It's no larger than two inches in size after all. He can easily smite it with his God given powers. Should he?
The strange feeling of cold discomfort in his gut keeps him where he is. Rooted to the floor of the abandoned ware house. Is it smirking at him? He squints his eyes to see more in the dark.
Indecision shatters at last when the spider feels the tremor in the air before he does. The arrival of the Winchester brothers, noisy and intrusive in the evening air. It retreats back into the dark faster than Castiel deems possible for such a creature.
Phew! He breathes a sigh of relief, turns to face the brothers and pretends that he's fine, back to being the unshaken soldier of heaven…