The effectiveness of advanced restraint systems is often reduced or compromised by un- correct or unforeseen body movements before the impact, determining the known "out-of- position" situation;​ it is however very difficult to simulate these movements with dummies, or even with volunteer drivers.

This paper analyzes a series of crashes happened in a span of over ten years in a famous driving school based at a racing circuit in Italy, with cars equipped with videorecorders and telemetry, allowing to gather both visual and numerical informations not only upon the impact itself, but also upon the preceding seconds, and the driving mistake that caused the crash.

This sample comprises impacts against barrier and rollovers;​ from videorecording analysis it is possible to draw realistic information upon occupants' movements in the pre-impact and impact phases, both inertial and voluntary, and upon their kinetic parameters.