While the electronic populations encode important features of the dynamics, it is essential to consider additional properties for a comprehensive assessment of a method, aiming to reveal subtleties and highlight differences. Therefore, we analyze the vibrational dynamics, in terms of positions, momenta and kinetic energy. Since DMABN has 57 vibrational degrees of freedom, we singled out one normal mode on which we focus our analysis, namely the normal mode coordinate q 46 , which is an in-phase ring distortion involving the CC stretching in the phenyl ring (shown as arrows in the upper left corner of Fig. together with a ball-and-stick representation of DMABN). In Ref. [88], based on ab initio calculations, this mode was identified as strongly activated upon photo-excitation, while in Ref. [73], the value of the coordinate q 46 at the minimum energy CI was one the largest (considering that the FC point is at the origin). Both observations are indications that this CC stretching motion after photo-excitation largely differ from the analogous motion in the ground state in the FC region.