(1) “You can keep it,” said Harry, laughing at how pleased Ron was.
(2) “I always said he was off his rocker,” said Ron, looking quite impressed at how crazy his hero was. (Harry Potter and the Sorcerer's Stone, p.200, p.302)
(3) His questions showed me how complex and mysterious were certain institutions of the Church which I had always regarded as the simplest acts.
(James Joyce, Dubliners)
In (3), it seems that subject-verb inversion has occurred after interrogative phrase, probably because of the heaviness of the subject. Can I similarly invert the sentence in (1) and (2)?
If so, are they just options, or is there some semantic difference, for example emphasizing the clause?