Should have said densest substance on Earth. Fill it with neutron star and you’ll be approx. 30 trillion kg overweight.

Had to post this correction before @neiltyson popped in with an "Actually..."

I don't have anything to plug, so just try to be a little bit better than normal if you happen to think of it, but don't make a big deal out of it--no one's asking you to be a saint.