Trajectories of runaway star group 2 originating from a subcluster merging into the central cluster, with color indicating the stellar velocity (light= v_max, dark= v_min). The dots in the top row (analogous to Fig. 6) represent star particles, and the star markers indicate the runaway stars in the group as they form. The bottom row (analogous to Fig. 7) shows the same runaway star trajectories, with the potential of gas and stars plotted as isosurfaces. The isosurfaces show four values of the gravitational potential of both the stars and gas, |U_g| = 10^47,48,49,50erg, with dark to light from lowest to highest.