I don't think there's any danger of hand-whacking since I'm holding onto the knife handle and whacking the back of the knife. When the knife is all the way in, I start pounding the knife and squash against the cutting board. Or hammer at the tip of the knife. It seems fairly safe to me!

Is that how you cut your squashes? Microwave them first? I'll have to try it.

Gosh, I'm loving the squash right now. Eating it every day. YUM!