  Analysis of high multiplicity events produced in 158A GeV/c
$^{208}$Pb-$^{208}$Pb collisions is carried out to study the event-by-event
fluctuations. The findings reveal that the method of scaled factorial moments
can be used to identify the events having densely populated narrow phase space
bins. A few events sorted out adopting this approach are individually analyzed.
It is observed that these events do exhibit large fluctuations in their
pseudorapidity, $\eta$ and azimuthal angle, $\phi$ distributions arising out
due to some dynamical reasons. Two particle $\Delta\eta$-$\Delta\phi$
correlation study applied to these events too indicates that some complex
two-dimensional structure of significantly high magnitude are present in these
events which might have some dynamical origin. The findings reveal that the
method of scaled factorial moments may be used as an effective triggering for
events with large dynamical fluctuations.
