My car seat suddenly slipped back as I was driving up a steep hill and therefore, I could not reach the accelerator, brake, or clutch. It was terrifying, and the only thing that saved me from rolling backward out of control was that I was able to yank on the emergency brake, which, fortunately, was located between the two front seats, and not under the dashboard. Hans Art Automative removed the seat and diagnosed the cause: a broken spring; plus Hans said the cable needed to be replaced. Not only that, but the ever-knowledgeable Hans recalled that in the 1970s, after a series of crashes of certain private airplanes, the cause was eventually determined to be the same kind of seat failure I had experienced; he added that the plane seats were on even-longer tracks than those of my car. I am a longtime customer of Hans Art Automotive, where I always feel that I am in the most capable and conscientious hands..