Fur standing up: Angry or frightened. Held very low or tucked between legs: Insecure or anxious. Thrashing back and forth: Agitated; the faster the tail, the angrier the cat. Straight up, quivering: Excited, really happy or, if your cat hasn't been neutered or spayed, they could be getting ready to spray something.
Explanation:
in other words, the cat looks frightened/surprised
Answers & Comments
Answer:
Fur standing up: Angry or frightened. Held very low or tucked between legs: Insecure or anxious. Thrashing back and forth: Agitated; the faster the tail, the angrier the cat. Straight up, quivering: Excited, really happy or, if your cat hasn't been neutered or spayed, they could be getting ready to spray something.
Explanation:
in other words, the cat looks frightened/surprised