  The temporal evolution of the spectral break in the time resolved spectral
energy density of the broad band afterglow of gamma ray bursts (GRBs) 091127
and 080319B was shown recently to be inconsistent with that expected for the
cooling break in the standard fireball model of GRBs. Here we show that it is,
however, in good agreement with the predicted temporal evolution of the smooth
injection break/bend in the cannonball model of GRBs.
