You Could Turn Earth Into A Black Hole
Anything can become a black hole if squeezed small enough. If you compressed the entire Earth into a sphere just one centimeter wide, it would possess the gravitational pull of a black hole.
This specific size threshold is known as the Schwarzschild radius, and it applies to every object in the universe. Whether it is a giant star or a tiny pebble, if you pack all that mass into a small enough space, gravity becomes inescapable. Even light would not have enough speed to break free once it crossed that boundary. It is a strange thought that every person you know is technically a potential black hole hiding in plain sight.
Source: Schwarzschild radius