Mischievous dog chasing a panicked postman on suburban sidewalk

Create a dynamic 1950s American comic-book style illustration of a mischievous dog chasing a startled postman down a suburban sidewalk. Use bold black ink outlines, dramatic action poses, halftone dot shading, vintage four-color printing, slightly faded paper texture, and vivid mid-century colors. The postman should have a panic-stricken expression and be running with letters flying from his mailbag while the excited dog races behind him. Add expressive faces, exaggerated motion lines, and a playful sense of chaos. Include a retro comic-book panel composition and a small caption box reading, “YIKES! NOT AGAIN!” Evoke the authentic visual feel of a classic 1950s comic without copying any specific existing comic or artist.