Trajectories of runaway star group 1 originating from a subcluster merging into the central cluster, with color indicating the stellar velocity (light= v_max, dark= v_min). 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. As the runaway stars form, they are plotted with star markers. The total number of stars in the cluster is listed in each panel.