io9 has a post about the killer science thingy.
To summarize: the chances of a mini black hole forming is about the same as monkeys flying out of my butt. If monkeys do fly out of my butt, they'll pop back out of existence before they do any damage. And since the science thingy is only hurling particles at each other, which collide in space all the time, then we would've noticed things in space being devoured by monkeys that had flown out of my butt.
So that's a relief.