《太平广记·卷三百四十五·鬼三十》
说完，腾身离开，一会儿就没有了，竟然不知道他是什么怪物。
言讫，腾身而去，顷之方没，竟不知其何怪也。
After speaking, he left in a leap, and in a moment he was gone, and it was not known what kind of monster he was.
<s>[INST] Explain the meaning of this Classical Chinese passage in English: 言讫，腾身而去，顷之方没，竟不知其何怪也。 [/INST] After speaking, he left in a leap, and in a moment he was gone, and it was not known what kind of monster he was.</s>
Explain the meaning of this Classical Chinese passage in English: 言讫，腾身而去，顷之方没，竟不知其何怪也。
user
After speaking, he left in a leap, and in a moment he was gone, and it was not known what kind of monster he was.
assistant