Was Qin Wuyang really afraid when Jing Ke assassinated the king of Qin?

When Jing Ke assassinated the king of Qin, Qin Wuyang was really scared, because although he killed people in the street when he was a child, he didn't change his face, didn't jump, and didn't get punished, because all he killed were ordinary people, and his grandfather was behind him, so he wasn't afraid, but when he assassinated the king of Qin, he was still afraid of the identity and status of the king of Qin, so in the end he was afraid.