While driving down the highway at legal speed limit of 70 mph, the sun roof detached from my 1996 acura integra and landed somewhere behind the car on the highway. i was in traffic and could not stop immediately to see what happened to the sun roof. the sun roof was original equipment and held in place by an adhesive only. to my knowledge, no car or person was hit by the detached sun roof, but it could have caused a serious accident.