The theoretical results may also facilitate the deeper understanding of the mechanism of the molecular transformation. The first and dominating term in the energy expansion (eq. 25 and 28) is the reaction force work; the energy required to shift the nuclei to new positions on a reaction step. In an actual reaction, this energy is likely to be provided by a collision, resulting in a non-equilibrium excited state (vibrational or electronic) and possibly the starting point for further process leading to a new state of equilibrium. In order to apply the reaction fragility analysis to monitoring the electronic structure of such system on its way, the coupling with the direct dynamics simulation might be considered. Combining with the reaction fragility method would open the direct dynamics simulations to exploration by chemists and would allow widening the studies on reactions beyond the IRC regime.