Spatial distribution in the x direction of B_ya); gas pressure b); density c); v_xd); v_ye); and temperature f) for the neutral (red) and ionised (blue) fluids at time t = 1τ. The green line indicates the total (pressure and density) or the difference (x and y velocities and temperature) for the two fluids. The dashed black line shows the reference MHD solution. The ionised plasma has taken on characteristics that are similar to the ideal MHD solution (but with faster wave speeds); the neutrals, however, are undergoing a violent expansion similar to that of a 1D point explosion.