Take a handful of popcorn corn, throw it into a frying pan and see it scatter.
Some of the corn will pop and settle.
Some will pop and fly out of the pan, forever lost down the back of the cooker.
Some will just smolder and burn and smell bad.
Some will stubbornly refuse to do anything, no matter how many times you try to cook them.
You can take a handful and enjoy it, but there will always be a few that taste funny or didn't pop properly.
That's how I would describe the way my brain works - I just have a head full of popcorn!