What do you think of this sentence? "Ariane watched him go with a sigh."
It sounds fine to me.
It's definitely incorrect.
It might be correct, depending on the context.
I would agree with 61% of you. I couldn't include the long paragraph in which this sentence appeared, but it was clear from the context that the man left and the woman sighed. "Go with a sigh" makes it appear that the man sighed.