  We present the results of hydrodynamic (SPH) simulations showing the
coalescence of a black hole with a neutron star to be a promising theoretical
source of short duration gamma-ray bursts. The favorable features of the
process include rapid onset, millisecond variability, a duration much longer
than the dynamical timescale, and a range of outcomes sufficient to allow
variety in the properties of individual gamma-ray bursts. Interestingly, the
process of coalescence differs rather markedly from past predictions.
