The population dynamics for this trajectory showcase the complicated nonadiabatic event at 10 fs which all mapping approaches fail to capture once averaged over the 1000 trajectories. While the single trajectory population does not match the AIMS result in magnitude of population, it shows the fine structure (a short plateau/recurrence in S1 population) of the AIMS result at 10 fs which becomes absent upon trajectory-average. Furthermore, the dynamical evolution of S1/S0 coherence is readily available from the spin-LSC approach, and correctly indicates regions of the strong coupling by the dynamic oscillation frequency primarily dictated by the inverse of the energy difference of the electronic states. As our final molecular example, we present the population dynamics of the 1,2-dithiane molecule upon excitation to the S 1 state. This model showcases an extended CI between S 1 and S 0 which manifests as the S-S bond breaks. Periodically, roughly every 300 fs, the S-S bond reforms and thus moves the system away from the CI. Fig. shows the population dynamics, which for the benchmark AIMS result showcases non-trivial S 1 population recurrences while the system is in the CI. During this time (starting from ∼ 30 fs), the energies of the S 1 and S 0 state are degenerate for 100's of fs (see Fig. ). In contrast to the AIMS result, all other approaches provide It is important to note that only 200 trajectories were used in the construction of panel a and with a larger time step of dt = 0.5 fs due to the computational cost of the extended time scale of 500 fs compared to 100 fs shown in Fig. .