  A number of stellar astrophysical phenomena, such as tidal novae and
planetary engulfment, involve sudden injection of sub-binding energy in a thin
layer within the star, leading to mass ejection of the stellar envelope. We use
a 1D hydrodynamical model to survey the stellar response and mass loss for
various amounts ($E_{\mathrm{dep}}$) and locations of the energy deposition. We
find that the total mass ejection has a nontrivial dependence on
$E_{\mathrm{dep}}$ due to the varying strengths of mass ejection events, which
are associated with density/pressure waves breaking out from the stellar
surface. The rapid occurrence of multiple breakouts may present a unique
observational signature for sudden envelope heating events in stars.
