Per my previous post here: https://lemmy.dbzer0.com/post/73212117
These were pushing themselves off of the plant. Based on how they taste and smell, we've decided they are in fact blackberries.
Edit: local horticulturist confirms blackberry.
My family and I just today picked about a kilo of blackberries walking home from the pool, planning to make pie.
I think they're not supposed to ripen this early, I hear it's the heat.