  This (rather subjective) review sums up few years of work devoted to explain
various aspects of high energy heavy ion collisions using the AdS/CFT
correspondence. The central issue of is is formation of the trapped surface
(black hole) phenomenon, seen by a distant observer as the entropy production.
We end up discussing an issue of classical gravitational radiation by an
ultrarelativistic falling body and the so called breaking self-force related to
it.
