  We report on a search for anomalous kinematics of ttbar dilepton events in
ppbar collisions at sqrt{s}=1.96 TeV using 193 {pb}^{-1} of data collected with
the CDF II detector. We developed a new a priori technique designed to isolate
the subset in a data sample revealing the largest deviation from standard model
(SM) expectations and to quantify the significance of this departure. In the
four-variable space considered, no particular subset shows a significant
discrepancy and we find that the probability of obtaining a data sample less
consistent with the SM than what is observed is 1.0-4.5%.
