Scissor doors (also called flap doors, wing doors, beetle-wing doors, turtle doors, switchblade doors, swing-up doors, upswing doors, Lamborghini doors, and Lambo doors) are automobile doors that rotate vertically at a fixed hinge at the front of the door, rather than outward as with a conventional door. History The first vehicle to feature scissor doors was the 1968 Alfa Romeo Carabo concept car, designed by Bertone's Marcello Gandini. The door style was dictated by Gandini's desire for an innovative design, and by his concern over the car's extremely poor rear visibility. In order to reverse the car, the driver would be able to lift the door and lean his upper body out of the hatch in order to see behind the car. The first production car to feature the doors was a Lamborghini, Gandini's Countach; the sports car's wide chassis created similar problems to those found on the Carabo, calling for the unusual door configuration. This sports car was quite impractical for real life, as due to unusual design it was impossible to backup without doors open wide. So, such doors were originally offered as a practical measure that helped the driver. Besides, traditional swing-open doors would make it more difficult to get out of the vehicle due to high door sills. The doors were used on the Countach's successor, the Diablo, on its replacement, the Murciélago, and on a low-production run derivative of the Murciélago called the Reventón. The Centenario is the latest Lamborghini car to feature the trademark doors. Having used the exotic door style for several of its cars, the Italian manufacturer has become synonymous with the implementation of scissor doors, which are sometimes colloquially referred to as "Lambo doors". Today many aftermarket companies are specialized in production of scissor door conversion kits for regular production cars that originally come with regular doors. A common scissor door conversion kit (also known as a "Lambo-door" kit) includes model specific redesigned door hinges and gas filled shocks. Such kits are usually bolt-on or weld on and require some modifications to front bumpers and door panels. Original door panels are not replaced, so a vehicle looks standard from the outside, when the doors are closed. Advantages Offers the possibility of operating the car with the door open, in a manner that would be difficult or impossible in a car with conventional doors. Because the doors stay within the car's track