I'm stuck on whether it's good style to use a comma to set off a participle by itself from the rest of the main clause:
e.g. Alice walked out of the burning school(,) crying, and joined the crowd of students, teachers, and police officers.
It isn't ambiguous here about whom 'crying' is referring to, which is why I'm wondering if both versions of the sentence are grammatical. However if I did set it off, does the participle need an object, or is it fine being on its own as an adjective modifying Alice?
Also, would it even be fine to write:
e.g. Alice walked out of the burning school, crying. She'd left her backpack containing all of her project notes in the library when she was forced to evacuate.