Initial and evolved states of our fiducial model (b01.a90.2D, i.e., with β = 0.1 and a = 0.90) after the magnetic field was turned on, with fluid density in color contours with the magnetic field lines plotted on top (top row) and velocity streamlines overplotted (bottom row). The top panel demonstrates magnetic reconnection events in the equatorial region, and the bottom panel shows the outflows that developed and proceeded outward.