  In the context of the AdS/CFT correspondence we discuss the gravity dual of a
heavy-ion-like collision in a variant of ${\cal N}=4$ SYM. We provide a gravity
dual picture of the entire process using a model where the scattering process
creates initially a holographic shower in bulk AdS. The subsequent
gravitational fall leads to a moving black hole that is gravity dual to the
expanding and cooling heavy-ion fireball. The front of the fireball cools at
the rate of $1/\tau$, while the core cools as $1/\sqrt{\tau}$ from a
cosmological-like argument. The cooling is faster than Bjorken cooling. The
fireball freezes when the dual black hole background is replaced by a confining
background through the Hawking-Page transition.
