Acorn squah was unplanned vegi for us. It had sprouted from a compost pile somehow. so we transplanted and wondered what it would turn into. Voila, we got acorn squash.
We have the same thing, but we don't yet know what our compost plant will be. It's definitely of the squash/melon family. I'm guessing canteloupe, but it could be acorn...or pumpkin...or spaghetti... Luckily, I don't think it's *another* zucchini!