>>4
As I said, they're testing multidimensional theory. the collisions that they are making are less energetic than the most energetic of the particles already colliding with the upper atmosphere already. if they create black holes, it will be nothing different than the black holes created above our heads every day. if not, well, there weren't any black hole above our heads then.
the trick with black holes this small is that the decay extremely fast. unless they're in an accelerator surrounded by detectors, they'd decay too fast for us to know they're there.
in the case all these theorys are wrong, however, the exparament simply won't work.