“A short story is a different thing altogether — a short story is like a quick kiss in the dark from a stranger.” — Stephen King How to Write a Short Story
What does this "—" mean? Please explain the use of this in the given context.
Traditional style would recommend a colon ( : ) in place of that dash ( — ).
Either one means something like "Here is another way to restate the preceding clause,"
or "Here is an explanation of the preceding clause."