Left top panel shows the evolution of the normal magnetic field as the twisted torus emerges. The left bottom plot shows the magnetic and kinetic energies as a function of time. The other three panels are meridional cross sections of J/B, the radial velocity and the density change w.r.t the initial denisty. The substructure of the coronal cavity for three CMEs are clearly seen in the density panel. Compare this with the coronagraph image sequence of cannibal CMEs observed by NASA's SoHO mission .