The Screaming Pow is a sound effect that is often used in comic books to represent the sound of a punch or a physical impact. It is one of the most iconic sound effects in comic book history, and it has been used for decades to create a sense of excitement and action. Pow was first used in comic books in the early 1940s. It was popularized by the superhero comic book series Superman, which featured a character named Jimmy Olsen who would often exclaim Pow! whenever Superman punched a villain. A Yellow Screaming Pow on Red Sticker.