  It is suggested that many $\gamma$-ray bursts (GRBs) are cloaked by an
ultra-relativistic baryonic shell that has high optical depth when the photons
are manufactured. Such a shell would not fully block photons reflected or
emitted from its inner surface, because the radial velocity of the photons can
be less than that of the shell. This avoids the standard problem associated
with GRBs that the thermal component should be produced where the flow is still
obscured by high optical depth. The radiation that escapes high optical depth
obeys the Amati relation. Observational implications may include a) anomalously
high ratios of afterglow to prompt emission, such as may have been the case in
the recently discovered PTF 11agg, and b) ultrahigh-energy neutrino pulses that
are non-coincident with detectable GRB. It is suggested that GRB 090510, a
short, very hard GRB with very little afterglow, was an {\it exposed} GRB, in
contrast to those cloaked by baryonic shells. \end{abstract}
