When dealing with non-reactive processes, a MLP is usually trained on atomic and molecular configurations that are either minima in QM, or represent variations within configurational basins. This method works well, but will become less and less accurate as the system explores region further away from the original stable basins. When studying reactions or attempting to create RMLPs capable of modeling reactive events, the aforementioned method is insufficient. Correspondingly, some forms of sampling that allow for configurations where bonds break/form are needed. How to do this without using expensive QM while still creating enough data for the RMLPs to be faithful to the original PES is still a challenge.