Smoothed trajectories of gas tracer particles that are located in the central region of the galaxy at z = 1.6. The greyscale background represents the gas temperature (i.e., cold gas in a darker color). Blue lines are the trajectory of the inflow gas 500 Myr before the central AGN activity. Red lines indicate outflow gas expelled by the violent jet. Green lines are similarly blown out but return back to the galactic disc.