Here's a popcorn kernel:
When it's going to pop, who knows where that rupture line is going to be? Not you, that's for sure. But what if we could control the popping location?
I propose a suit of armor, with a little hole in it. The armor, which could be an electroplated metal coat or a thick layer of plaster or something, will force the kernel to pop at the little hole, creating mushroom-cloud-shaped popcorn. Hooray!
