A fun, cartoon-style illustration of anthropomorphic cars stacked directly on top of each other in a vertical line, balancing like gymnasts. Each car has a unique, quirky personality, with expressive headlights and grinning front grills. The cars are brightly colored and have outstretched wheels or side mirrors to maintain their balance. Colorful exhaust clouds and speed lines swirl around the stack, adding a sense of movement and fun. The background is a vibrant cityscape, with playful details and a lighthearted, comical tone. --ar 16:9