A worker suffered severe burns on his ring finger when his wedding ring touched the opposite terminal of a car battery he was working on. The ring created a direct circuit that flashed and melted the ring into his skin, causing third-degree burns before he could remove it. The document advises removing jewellery when working to avoid similar accidents, as jewellery can conduct electricity, get caught in machinery, or snag if one falls. Safety should be the top priority, and removing jewellery eliminates potential hazards.