Mock-observed on-sky satellite distributions of the three simulated systems that have satellite plane parameters as extreme as observed. The satellite galaxies (circles) are color coded by their line-of-sight velocity relative to the host (black cross). The dashed lines indicate the major axis of the projected distribution of satellites. The top labels give the minor-to-major axis flattening b/a of the on-sky distribution for the simulated systems, as well as the number of correlated velocities N_corr.