Let's be real. The only people who understand how magnets work are scientists and students who happen to be studying them right this second. What we do know about them, however, is that they stick to metal and they are repelled by other magnets.
But who cares about all of that? Let's watch some magnets destroy stuff.
That was way more fun than hearing about the boring science behind it. Sure, that would have been more educational, but sometimes you just want to watch magnets ruin things. It's way cooler. We'll save the learning for school, because right now, it's summertime and we don't care.