Right. There were a lot more that didn't have relevance, so I don't want to be misleading by making it seem like every firefly myth ever has some connection, but these seemed like the most useful.
I think it could definitely be related. My other thought was that a backwards five when reflected becomes forward-facing. There's a lot of mythology on mirrors and reflections having to do with souls, and the only way it'd be forward-facing is by looking at your reflection.