I've looked all over but have not found this example.
Can one use a semicolon after a colon or em-dash (or similar doubling up combinations). Is it a matter of style or is there a fast rule?
e.g.:
The quiet was interrupted by a clacking noise: a man was running down the street in his dress shoes; as he did, he repeatedly looked at his watch.
The quiet was interrupted by a clacking noise—a man was running down the street in his dress shoes; as he did, he repeatedly looked at his watch.
The quiet was interrupted by a clacking noise; a man was running down the street with three items: a book, a ball, and a bag.
These may not be the most elegant sentences as I'm just making them up now, and I know they can be rewritten, but is it acceptable according to respected writing style guides to "double up" punctuation like this?