Recent theoretical works have also explored dynamical effects related to intra-molecular vibrational energy redistribution of the molecules coupled to an optical cavity. Ref. 97 uses numerical simulations to investigate the dissociation dynamics of a triatomic molecular system (ozone) coupled to a cavity photon mode. Classical molecular dynamics is used to describe all degrees of freedom, including the nuclear DOF R and the photonic DOF q c . In this work, the dissociation dynamics were studied in the absence of a dissipative bath and by initiating the system in a non-thermalequilibrium initial condition. Specifically, the cavity photon mode was initialized at zero temperature, while the molecular subsystem was initially deposited with enough energy (∼ 34 kcal/mol) to ensure that the dissociation of the ozone molecule takes place on a short time scale. It was found that when the cavity frequencies are close to vibrational modes, the "hot" molecular subsystem (with a high enough initial energy) efficiently exchanges energy with the "cold" cavity photon mode, leading to a suppression of the dissociation probability. While such a setup may not be representative of chemical kinetics in real molecular systems given its highly non-equilibrium initial state, it further illustrates the rich dynamical interplay between the cavity and molecular vibrations, which cannot be captured by static electronic structure calculations.