There would be <value too high for int> threads about stuff with <irrelevance > 9999 {ERROR} > such as RAINBOW UNICORNS (which are totally awesome).
What if everyone in the world got off Facebook for a minute?
If it's a stellar mass black hole, you will be shredded by tidal forces created by the black hole's gravity. If it is a supermassive black hole, then you fall inside, only to be completely vaporized by a wall of infinitely blueshifted radiation known as the inflationary instability.
What if you collided into Earth at nearly the speed of light?
Nothing good - first we'd probably smash into another planet, then the two stars would detonate, vapourizing us.
What if nothing happened in the world for a day?