Comparison between observations and simulations at three instances. (a) EUI 174 Å images displaying the temporal evolution of the spiral jet eruption with arrows indicating dark threads. The blue dashed curve in panel a1 indicates the path of the inserted flux rope. (b) Temporal evolution of 3D magnetic field lines as viewed from the top. (c) Same as panel b, but as viewed from the side. The lines in blue and red correspond to cold and warm plasma, respectively. The red dashed lines indicate the plane in Fig. C.1.