  The bumpy light-curve of the bright optical afterglow (AG) of gamma ray burst
(GRB) 021004, its spectral evolution and its radio emission have been claimed
to be unusual. In the Cannonball Model of GRBs that is not the case. The very
early AG's shape is, as for GRB 990123, a direct tracer of the expected
circumburst density profile. The unprecedented precision of the data allows for
the ``resolution'' of two cannonballs (CBs) in the AG. These two CBs correspond
to the two pulses in the GRB and to the two wide humps in the AG light curve.
The smaller wiggles in the AG are, as for GRBs 000301c and 970508, to be
expected: they trace moderate deviations from a constant density interstellar
medium. The observed evolution of the optical spectrum is that predicted in the
CB model. The X-ray and radio emissions of GRB 021004 are also normal.
