  We discuss an exact time dependent O(3) symmetric solution with a horizon of
the 5d AdS classical gravity equations searching for a 4d boundary theory which
would correspond to expanding gauge theory matter. The boundary energy-momentum
tensor and entropy density are computed. The boundary metric is the flat
Friedmann one and any time dependence on the boundary is incompatible with
Minkowski metric. However, at large times when curvature effects are
negligible, perfect fluid behavior arises in a natural way.
