Result of the caustic mass analysis for the Exemplar (top panel) and the Double Irony (bottom panel). The dots shows the positions of the galaxies in phase space (R is the distance on the sky to the brightest galaxy, and v_los is the line-of-sight velocity relative to the mean line-of-sight velocity of the galaxies in the region. The magenta lines show the caustic lines. Galaxies outside the caustic lines have a v_los greater thanthe escape velocity of the cluster/group.