  Since the early seventies, there was a conjecture that the first collapse of
a selfgravitating dust--like medium (appropriate approximation for nonbaryonic
dark matter) results in the formation of a ``pancake" object, that is a thin
surface. The conjecture has been based on the Zel'dovich approximate solution
of the nonlinear gravitational instability of a generic smooth density
perturbation. Recent works cast doubt on the Zel'dovich conjecture, suggesting
that the first collapse might be point--like or filament--like rather than
pancake--like. Our $N$--body simulations show first pancake collapse. We can
reject with 97\% confidence the Bayesian prior that the other kinds of collapse
are more or equally probable.
