What happened after that had a dreamlike quality

What Scout means by this is that everything seemed like it had that feel of being in a dream. The ‘jury returned like underwater swimmers’ and ‘Judge Taylor’s voice came from far away, and was tiny’ and two parts of the next sentence that Scout is referring to. She is seeing things in a sort of slow motion, like she is day dreaming, while she tries to work out what is going to happen next. Was the jury going to convict Tom? Of course they were, it was inevitable, but she didn’t want him to go to jail.