How authentic are the stories told about the terrors of the grave?

Q: Stories are told about the terrors of the grave, such as the story of a man who wanted to be buried, but a snake came out to him, so he was placed in another grave, and a snake came out to him there as well?

A: Allah knows best about that, but it is not far-fetched. Ibn Rajab mentioned in his book (The Terrors of the Grave) things regarding these stories, so Allah knows best about their authenticity.