summary - Proposes that if the fundamental Planck scale is ~TeV (per large-extra-dimension models), the LHC would produce microscopic black holes at a rate of roughly one per second, decaying via Hawking radiation into characteristic hard multi-jet/lepton final states with little missing energy - offering an experimental handle on quantum gravity and the number of extra dimensions. One of the two founding papers (with Giddings-Thomas, submitted within days of each other) of the “black holes at colliders” literature - the production-rate estimate the entire safety question is a response to.
relevance_note - The canonical claim that TeV black-hole production would even happen - the premise the whole safety debate presupposes.