Adventures into the Unknown #143

"Old Ya-hoooo!" introduces Vic Bailey, a man whose accidental head wound opens a startling window into a hidden, advanced civilization nestled within our own world. Written and illustrated by John Rosenberger, this 1963 tale from the American Comics Group explores the fleeting glimpse of another reality—before it vanishes as quickly as it appeared. The eerie, dreamlike vision is captured in full on the cover by Ogden Whitney, whose distinctive pencils and inks bring the mystery to life.