  We investigate a scenario where conditions for Mott dissociation of
charmonium are fulfilled locally in ultrarelativistic heavy ion collisions at
the short time scales before hadronization and study possible consequences to
be drawn from observation of ``anomalous'' thresholds in the J/\psi suppression
pattern. We suggest that for a compilation of experiments with different
kinematics, variables presently in use to display the observed suppression
pattern should be rescaled by the $\gamma$ factor of the $c\bar c$ state
relative to the participant center of mass. This systematics can be tested by
inverse kinematics experiments as, e.g., Pb-S collisions and by sampling data
sets in p_T and y of the dimuon pairs.
