Occurence: The Incredible Hulk #391

The Hulk goes one-on-one with the mutant Havok, who is as has been said many times is the most powerful mutant there is. Havok absorbs the Hulk's gamma radiation, weakening the Hulk, and then fires a huge blast at him. The Hulk survives the blast while Havok is knocked unconscious.

 

Hulk's Physical Resistance Feats

Incredible Feats of the Hulk Main Page