We need a volunteer, on which to test the theory.
If such a thing were to be created by the collider, it would vaporize anything which came within it's event horizon (the size of an atom or smaller) and immediately fall through the bottom of the collider and start heading for the core of the Earth, where it would sit and consume any matter which wandered into its event horizon. It would also produce an outward energy pressure due to the destruction of atoms crowding to get into its event horizon (some portion of energy would probably escape due to orbital acceleration before it entered the event horizon) and this might cause an equilibrium of sorts where the tiny black hole might burn like a little star at the Earth's core (just as the outward energy of a star's nuclear reactions prevent a gravitational collapse) for some unknown period of time. Eventually the hole would eat the planet and continue orbiting the sun in place of the Earth, a tiny invisible speck in the darkness of space with a moon orbiting it.
Ha! Some kids in the learning center were asking about this today. I was pretty much right on!
If you went into a black hole you would very quickly be compressed into a singularity, however all laws of maths and physics breaks down at the point of singularity so something must come out... and it does!...