Methylammonium lead iodide is currently one of the most promising materials for solar energy applications, with light-conversion efficiencies exceeding 20%. Although insightful, conventional spectroscopic techniques (including inelastic neutron scattering) can only provide us with a detailed picture of MAPI at low temperatures given the large degree of dynamical disorder. This limitation can be circumvented via the use of mass-resolved neutron spectroscopy on VESUVIO, to probe nuclear motions of both light and heavy atomic species across the three known phases of the material at ambient pressure. We believe that this rapid-access request is justified given the current race to gain a quantitative understanding of this material (dozens of papers per week).