
A vintage-style metal warning sign with a bright mustard yellow background and deep burgundy header section, featuring bold yellow uppercase text reading "WARNING" at the top and "THINKING CAN CAUSE IDEAS" in large black sans-serif font at the bottom. Centered between them is a stylized anatomical brain illustration rendered in cream and black lines with bold outlines and cross-hatching detail, surrounded by radiating speed lines emanating outward in a starburst pattern. The entire sign displays authentic aged patina with rust streaking and weathering along the edges and corners, white paint chips and corrosion marks scattered across the surface, metal rivets visible at the corners. Shot straight-on in even lighting that emphasizes the vintage distressing and worn enamel finish, crisp clear focus throughout with high contrast between the bright yellow and deep colors, rendered as a detailed product photograph capturing the industrial sign aesthetic with textured surface imperfections and realistic metal oxidation that suggests decades of outdoor weathering. The overall mood is quirky, sardonic, and retro-humorous with the visual language of mid-twentieth century industrial caution signage reimagined with playful absurdist intent.