My friend could have been seriously injured by his 67 Dart convertible. One day while working under the hood in the garage, something got crossed and the car started cranking over....being in gear, it moved forward and pinned him to the back wall of his garage in such a position that he couldn't reach anything to stop the car....finally his son heard his cries for help and came to his rescue...SCARY stuff...He's since put a safety switch in...