Add a slightly tan-colored human forearm entering from the bottom edge of the image, resting naturally on the concrete slab. The hand is casually holding a thin, hand-rolled cigarette made with light paper. The cigarette is lit, with a small ember at the tip and a faint trail of light, wispy smoke drifting upward. Match the lighting to the outdoor scene (soft natural daylight), and ensure the arm perspective and shadows blend realistically with the concrete and surrounding environment.
