ambiguous sentences

English as a Second Language English Vocabulary, Grammar and Idioms
1
  1. I was met at the door by a Chinese man in a suit who ran down the steps laughing.

Do we miss “, and” before “laughing”?

  1. I was met at the door by a Chinese man, in a suit, running down the steps, laughing.

Is it possible to use #2 to substitute #1? What would be grammar problems with #2?

  1. I was met at the door by a Chinese man in a suit, running down the steps, laughing.

Would #3 mean that I was running down the steps, laughing or the Chinese man?

  1. I was met at the door by a Chinese man who was in a suit, running down the steps, laughing.

Is #4 less ambiguous?

  1. I was met at the door by a Chinese man - in a suit, running down the steps, laughing.

Is 5 good enough? Not ambiguous.

  1. At the door, I was met by a Chinese man, in a suit, running down, laughing.

Does fronting “at the door” guaranty it wasn’t me who was in a suit, running down, laughing?

Thanks

2
  1. There should not be an ‘and’
  2. Too many commas break the phrases up in an unnatural way.
  3. the man
  4. No ambiguity - it’s definitely the suit that was running down the steps! 5 is even worse.
  5. See (2).
    ‘fronting at the door’ doesn’t make sense to me so I can’t answer your question sorry.