Roy Lichtenstein's "WHAAM! (Corlett App. 7)" is a monumental diptych offset lithograph from 1967 that reproduces his iconic 1963 painting in vibrant printed colors across two sheets totaling nearly 1.3 meters in width. Created through the collaborative printing process with Beck and Patridge in Leeds, this work exemplifies Lichtenstein's signature appropriation of comic book imagery and Ben Day dots, transforming popular visual culture into high art through mechanical reproduction techniques. The dramatic composition depicting a military aircraft engagement captures the artist's fascination with translating mass media source material into large scale prints that challenge traditional distinctions between fine art and commercial graphics.