But it could have been close,
well according to some. This week they flipped the switch (or pressed zee button. or inserted the key, but that's neither here nor there) at the Large hadron Collider. They shot some protons through it and no black holes were formed. Phew.
Okay the chances of that happening were small, and the chance of that black hole actually being stable is about at the same level of spotting a sasquatch drinking tea in your backyard. But hey, at least now the scientists didn't make that rap for nothing.
Anyway here's a video about what would have happened if a black hole had formed.