Called it clap when I was a kid. However, . . . .

The world will end or it won't.

If it does, you won't be here to worry about it. If it doesn't end, you will be here to worry about it.

You will end or you won't. If you do end, you won't be here to worry about it. If you don't end, you will be here to worry about it.

So, it goes like this: Keep worrying, because it means the world didn't end. And if we know YOU are doing the worrying, then the rest of us can relax.