While a two-parameter (duration and spectral hardness) classification of GRBs has proven relatively effective at discriminating between different progenitor systems, it is worthwhile emphasizing that in reality the distinction can often be less clear. First, there is clearly overlap in the populations (Figure 3), and so some GRBs with t90 < 2 s will actually fall into the long-soft category. But more importantly, a number of what we consider "short" GRBs actually have a light curve with a short, hard spike, but also display longer-lived emission at higher energies as well. The most dramatic known example, shown in Figure 5, is GRB080503 \cite{Perley_2009}, where the long tail actually contains a higher fluence than the short initial spike. Such events are now paradoxically referred to "short GRBs with extended emission", a mouthful if ever there was one.