Comment Re:a microscopic black hole won't hurt you (Score 1) 148
Close but the Schwartzschild radius solution only applies to non-rotating bodies and any particle I can think of that is subject to relativistic mass increases also have spin, a closer fit would be a Kerr–Newman metric, however I'd assume that these solutions ignore external gravitational fields, which might be valid approximation over interstellar distances, it might not be valid in Earth's atmosphere for cosmic rays or inside the LHC. Perhaps a real physicist could chime in with a more learned point of view.