Given that the PES and the corresponding inter-molecular anharmonicity have been indicated to be behind the dynamics of glasses, harnessing these effects could lead to control over the physical properties of amorphous materials. To test this hypothesis, experiments were carried out on the FLARE instrument at the FELIX free-electron laser facility which allowed an investigation of how (molecular) amorphous solids respond to high-power pulses of low-frequency radiation. Given that such low-frequency pulses are not able to significantly heat the sample , changes in the material upon irradiation by high-power pulses can be induced by excitation to higher-order vibrational states due to the significant anharmonicity in the inter-molecular PES, since pure harmonic systems are forbidden from undergoing such transitions. Due to significant anharmonicity in the inter-and intramolecular interactions, such excitations can lead to increased displacements from the molecular pseudo-equilibrium positions (i.e. the potential energy minima), thereby allowing the molecules to move into new conformations. Furthermore, since the secondary glass transition temperature corresponds to energies in the terahertz range (200 K corresponds to a thermal wavelength of ≈ 4.2 THz), such experiments can serve to push the molecules over their potential barriers.