I will review the basic assumptions and spell out the detailed arguments that lead to the bound on the Regge growth of gravitational scattering amplitudes. The minimal extra ingredient compared to the gapped case - in addition to unitarity, analyticity, and crossing - that goes into the derivation is the assumption that scattering at large impact parameters is controlled by known semi-classical physics. I will also discuss bounds on the local growth of scattering amplitudes. Contact your local Triangle organiser or Bogdan Stefanski for Zoom link.