Crak! is a 1963 pop art lithograph by Roy Lichtenstein in his comic book style of using Ben-Day dots and a text balloon. It was used in marketing materials for one of Lichtenstein’s early shows. It is one of several of his works related to military art and monocular vision. According to the Lichtenstein Foundation, it was a marketing poster that “was published to announce Lichtenstein’s exhibition at Leo Castelli Gallery.