  We examine and develop the model of gamma ray bursts origin proposed by
Shaviv and Dar (astro-ph/9606032), according to which the strong gamma ray
emission is produced by the interaction of the baryonic relativistic jet
(outflow) with the soft photon field in a dense stellar region. It is shown by
the simulations of the burst profiles that these profiles are very sensitive to
the jet geometry, and the 'clarity' of the GRB profile is (in this model)
somehow connected with the gamma rays beaming. Also some event-rate based
restrictions are derived and discussed.
