  We present exact solutions of the (0+1)-dimensional kinetic equation for a
massive gas in the relaxation time approximation. At first, we analyse the case
of classical statistics and argue that the traditional second-order
hydrodynamics misses the shear-bulk coupling. In the next step, we include
Bose-Einstein and Fermi-Dirac statistics in the calculations and show that they
are important for description of the effects connected with bulk viscosity.
