Simulation by Philip Turner. Beware of misleading aspects in animations of diamondoid molecular machine elements. Pauli repulsion pushes the piston out of the slightly too tight cylinder. The effect gets weaker with progressive push-out but still suffices for a final ejection. A bend snap makes for a sudden re-acceleration and for strong excitation of mechanical modes. As a side-note: There is also some significant conversion to kinetic energy. This is around tens to ~100m/s. More like a crystolecule cannon/gun than a gentle push-out.
