The Incredible Hulk Vol. 1 (1962-1999) #109

Plot

The Hulk stops a deadly Chinese missile from being launched but the huge detonation drops him into the Savage Land where he transforms back into Bruce Banner; Being rescued by Ka-Zar from the Swamp Men, the jungle lord asks for Banner's help in deactivating a mysterious machine that is making weather all over the world to go wild and will eventually lead to the destruction of earth; The Swamp Men renew their attack and Banner becomes the Hulk to face the threat, totally forgetting about the deadly machine he was supposed to deactivate.