We discuss isovector giant dipole resonances built on high spin states observed in fusion reactions. We reproduce the main feature of the experimental data from the analysis of scaling solutions for out-of-phase small oscillations of two Vlasov fluids in a rotating frame. We consider also the problem of subthreshold π-production in heavy ion collisions. We show how to get a noticeable increase of the yield just considering collective dynamical deformations, of giant quadrupole type, in the approaching phase.