A comparison of the velocity distributions of globular clusters (GCs; solid histogram) and planetary nebulae (PNe; dashed histogram) from Ventimiglia et al. (2011). The vertical dashed line at 3765 km s^-1 indicates the mean of all GC velocities. The GCs have projected galactocentric distances that are smaller than 65 kpc in order to match the radial range of PNe. There are striking differences whose origin is not yet understood.