Chris Van Ee, Principal Engineer with Design Research Engineering, presented this at CPSC's ATV Safety Summit Oct. 12, 2012. ATV rollover events can lead to serious and fatal injuries. Field data indicate that some of these injuries result from ATV contact with the rider when positioned between the ATV and the ground. Crush protection devices (CPDs) are intended to reduce this injury mode by reducing the frequency of inverted ATV-rider contact. Currently, field data of real-world ATV rollovers is primarily limited to injury causing events and lack ATV and occupant dynamics necessary to evaluate the injury mitigation effectiveness and unintended consequences of CPDs. To increase understanding of ATV and rider dynamics for injury and non-injury rollovers, we collected and analyzed videos of real-world ATV rollover events identifying vehicle, environment, and rider factors. Vehicle dynamics and rider responses, including dismount kinematics, were analyzed to better understand rollover ATV-rider contact and non-contact scenarios. Active rider dismount was a common and effective strategy to avoid injurious ATV-rider contact. Video analysis and laboratory investigation demonstrates that one type of CPD may obstruct successful rider dismount and may result in injurious CPD contact with a dismounted rider who was otherwise uninjured. This analysis represents an important contribution to understanding the determinants of rider injury associated with ATV rollovers and the potential influence of a CPD.