Accident simulations involving the 90° collision of motorcycles against the side of moving passenger cars have been conducted and evaluated in cooperation between DEKRA and Winterthur-Versicherungen. In contrast to motorcycle collisions against stationary passenger cars, the tests involving collisions against moving passenger cars revealed a multitude of collision sequences corresponding to what really happens in an accident. In order to show this comprehensively, the overhead views of collision configurations, final positions and centre-of-mass paths have been selected for each individual case; to further illustrate the spatial complexity, side views have been provided of some collisions in the form of sequences of still pictures. Motion paths, velocities and impact events recorded by manual film evaluations, in connection with the vehicle damage thereby incurred, provide important information on collision dynamics.