Sylvester Stallone sold his original artwork "Knocking Heads" for $410,000 at a charity auction in Las Vegas, where he pledged to donate the funds to AIDS research through the amfAR foundation. The nearly wall-sized canvas features a street-graffiti meets cubism style with vivid colors and an image of Stallone as his iconic character Rocky Balboa. This is not the first time Stallone has showcased his artwork, having previously shared it on Instagram in March 2023, where he also revealed that he began painting at the age of nine.