Splash page from FANTASTIC FOUR #51. The story "This Man...This Monster!"by Stan Lee, Jack Kirby and Joe Sinnott is, in my opinion, the finest single comic book story of the entire Silver Age of Comics.
I remember buying this one off of the spinner rack in 1966 and being totally blown away by the dramatic, moving story of sacrifice and the true meaning of heroism. After forty-six years, the story still holds up. A masterpiece.