This paper is based on the results of a number of orthogonal dynomometric barrier tests carried out at the Crash Testing and Biomechanics Laboratory of INRETS. Eleven cars of different model and type were tested, drawn from cars that are common in Europe and being of widely varying lengths and masses. All these cars were equipped with either Hybrid II or IIIs. A large number of measurements were taken both inside and out. A force wall with 6 plates gave us information on where the energy was dissipated. We use this information to ponder on agressivity.