The source provides an extensive historical and technical overview of suicide doors, which are rear-hinged car doors that open toward the back of the vehicle. Originating from horse-drawn carriages, these doors were initially popular in early automobiles, offering ease of access, particularly in luxury models like Rolls-Royce during their peak in the 1930s and 1940s. The nickname "suicide doors" arose due to significant safety risks, as airflow could force the unlatched doors open at speed, potentially ejecting occupants before modern safety standards were enforced. While the design largely faded by the mid-20th century due to safety and cost concerns, the source notes a modern revival in luxury and niche vehicles, which now incorporate advanced electronic latches and reinforced structures to mitigate past dangers.