Evolution of simulation with the strongest spin-up event. Top: Specific angular momentum of the primary around the spin-up event highlighted in Fig. 5 for the turbulent Ωt_ff = 0.20 simulation. The points on the curve are the times that are shown in the projections below. The second and fourth points are the beginning and end of the spin-up event, and the third point is the middle of the spin-up. Middle and bottom: Density projections (calculated in the same way as in Fig. 1) and the magnetic Toomre Q, respectively, at the times indicated by the points in the top panel.