  Non-equilibrium features of a first order phase transition from the
quark-gluon plasma to a hadronic gas in relativistic heavy-ion collisions are
discussed. It is demonstrated that strong collective expansion may lead to the
fragmentation of the plasma phase into droplets surrounded by undersaturated
hadronic gas. Subsequent hadronization of droplets will generate strong
non-statistical fluctuations in the hadron rapidity distribution in individual
events. The strongest fluctuations are expected in the vicinity of the phase
transition threshold.
