Art: Jack Kirby
Inking: Dick Ayers
Lettering: Art Simek
It's a classic example of self-immolation today!
This is about as good as a Flame On gets.
Johnny's powering forward towards the camera, fully ablaze, a trail of fire looping behind him. His speech balloon bursts out of the panel - the frames of the comic aren't strong enough to contain his energy.
(Apart from a note that this comes from the second story in the issue, the titular battle with the Impossible Man)
Check out our coverage of Fantastic Four #11 on our ninth episode: Episode 9 - Patriotic Pedestrians Proceeding from Planet Poppup Prefer Poorly Produced Podcasts!