  It is shown that a scalar field, minimally coupled to gravity may have
collapsing modes even when the energy condition is violated, that is, for
$(\rho+3p)<0$. This result may be useful in the investigation of the possible
clustering of dark energy. All the examples dealt with have apparent horizons
which form before the formation of the singularity. The singularities formed
are shell focusing in nature. The density of the scalar field distribution is
seen to diverge at singularity. The Ricci scalar also diverges at the
singularity. The interior spherically symmetric metric is matched with exterior
Vaidya metric at the hypersurface and the appropriate junction conditions are
obtained.
