  We consider the totally asymmetric simple exclusion process (TASEP) with two
different initial conditions with shock discontinuities formed by blocks of
fully packed particles. Initially a second class particle is at the left of a
shock discontinuity. Using multicolored TASEP we derive exact formulas for the
distribution of the second class particle and colored height functions. These
are given in terms of the height function at different positions of a single
TASEP configuration. We study the limiting distributions of second class
particles (and colored height functions). The result depends on how the width
blocks of particles scale with the observation time; we study a variety of such
scalings.
