Over the past several years, Horner has been picking over the skeletons of Late Cretaceous dinosaurs from North America in an attempt to figure out whether some of the dinosaurs labeled as distinct species are actually growth stages of a single species.
"One thing that we see in other tyrannosaur species is evidence that maybe some of these young animals actually palled around in groups of juveniles - sort of rambling gangs of young tyrannosaurs - potentially even avoiding the adults."
"Rambling gangs of young tyrannosaurs"... I imagine them snapping their fingers and avoiding Officer Krupke. You can read more here and here.