Plausible mechanisms are discussed for explaining the sudden burst of energy released from 0.85 M Epsom (MgSO4·7H2O) aqueous solution following sodium metal dissolution which led to the vaporization of the entire system including the glass beaker. Exothermic reactions lead to micro/nano-metastable crystal formation due to steam cavitation. H2+ molecular ions trapped at Mg2+ ion lattice sites in cavitation-induced metastable crystals were considered as precursors for energy release. In principle, for charge compensation, two protons should occupy one Mg2+ lattice site in these crystals. Therefore, cavitation crystal formation brings in the two protons in molecular ions closer. This process is, however, opposed by Coulombic repulsion between the two protons which results in the collapse of the nanocrystal containing hydrogen. This leads to the release of hydrogen ions into the solution resulting in the release of hydration energy during the formation of H3O+, hydronium ions and in local heating. Stirring distributes the heat energy uniformly in the solution. Local heating, however, leads to the promotion of cavitation – this time with more vigor since additional energy input has occurred. Thus reformation of the crystal takes place quickly and the hydrogen ions are brought together more closer than during the previous occasion which increases the electrostatic repulsive force. As a result, the crystal collapses faster leading to the release of more hydration energy. This is how cavitation gains energy from repulsion. The above cavitation Coulombic repulsion oscillation (CCRO) cycle continues leading to an exponential build-up of the pressure and oscillation speed of the precursors and a decrease in inter-proton separation leading to their collision. Finally a sudden burst of energy witnessed occurs due to cavitation collapse. It remains to be ascertained if the energy release is a consequence of p–p fusion, or other mechanisms proposed which include volume casimir effect, miniature black holes and lattice phonon amplification. The fact that increase in the oscillation speed of the two protons in the proposed H2+ species is exponential without an upper limit till the end-point is reached should determine the logistics of the underlying mechanism causing the energy release. The p–p fusion should, however, be accompanied by positron emission whose presence could be verified by its annihilation gamma rays or with 5.5 MeV gamma rays produced from HD fusion reactions if energetic deuterium is formed from p–p fusion in amounts commensurate with the energy produced but this fusion process is mediated by weak interaction process and hence is less probable. No other proposal explains burst of energy observed better than the collapse of miniature black holes.