  It has been taken as a truth that collapsing matter can eventually cross the
horizon and enter into the interior of a black hole in a finite proper time.
However, the Rindler/tachyon dual description we suggest recently implies that
this should not be the case. A test particle falling towards the event horizon
of a non-extreme black hole can actually be viewed as an unstable particle,
whose dynamics is described by the tachyon field theory. This means that the
collapsing process of a free particle in Rindler space is essentially a tachyon
condensation process. In terms of the results in tachyon condensation, we learn
that the infalling particle should strongly couple to bulk modes and should
decay completely into something like gravitons before reaching the horizon.
Hence, there should be no matter that can cross a horizon as still matter. The
matter will get ``dissolved" into spacetime when approaching the event horizon.
