  We analyze the dynamics of up to $10^5$ electrons resulting from illuminating
a Xenon cluster with 9093 atoms with intense laser pulses of different length
and peak intensity. Interesting details of electron motion are identified which
can be probed with a time resolution of 100 attoseconds. Corresponding
experiments would shed light on unexplored territory in complex electronic
systems such as clusters and they would also permit to critically access the
present theoretical description of this dynamics.
