How does the excerpt exemplify the ideas King describes in "Danse Macabre"

The excerpt exemplifies the ideas King describes in "Danse Macabre" because it forces readers to “grapple” with their own mortality.

Explanation:

The excerpt mentioned in the question comes from the from the book “Danse Macabre” written by Stephen King. It is a non-fiction book  that talks about the fear and anxieties that prevail in the societies and the influence it has on the development of horror stories.

The excerpt has a feeling of hope which is overshadowed by his feeling of fear , uncertainty/unsuitability.The reader while reading the book are forced to analyse  their own mortality.The book initially portrays a situation in which everything is positive and is going according to the plan and then suddenly things turn upside down and everything turns down to a moment in the end and it is then that the human face their own morality.

Thus we can say that The excerpt exemplifies the ideas King describes in "Danse Macabre" as  it forces the  readers to “grapple” with their own mortality.