Collision outcomes from simulations of two mid 10 and 5 M_J clumps. There are no PM in this range of parameters and the collapse region becomes smaller compared to Fig. 9. Additional simulations at impact velocities below the mutual escape velocity (dashed red line) show that head-on collisions with ~350 m s⁻¹ initiate dynamic collapse. Only very grazing impacts can result in simple PM (see discussion in Section 3.6).