If only I had known how easy it could be (hint: it doesn’t require waiting for Dadoo to get out a wedge and hammer):
This actually works!
I felt a but silly tapping the coconut with a hammer, but it’s true–there is an equator of sorts that is vulnerable, and eventually cracks. On our coconut, it went through the poles instead of around the middle.
I’d never heard of the oven trick, either.
This was definitely worth the watch.