THOR versus HULK
"... Let no man tear asunder!" (Marvel comics)
Where: Avengers #5 When: March 1997
Why: Rob Liefeld & Jeph Loeb How: Rob Liefeld & Ian Churchill
The story so far...
Trapped in a pocket dimension created instinctively by the powerful son of Mr. Fantastic and Invisible Woman; the world's greatest heroes are reborn in new lives in the wake of the epic battle with the creature called Onslaught!
As though destined to relive key events in their lives, Bruce Banner is again exposed to a massive dose of gamma radiation, turning him into the incredible Hulk.
A mindless and rage-filled beast, the Hulk seeks the one opponent he can never reach: Bruce Banner! Following beacons of Banner's work, the Hulk charges Avengers Island where a live gamma reactor core is housed. Having demolished much of the building and the few attending Avengers themselves, Hulk stands supreme, but a certain thunder gods would have words with him...
Full Article: http://secretearths.blogspot.com/2007/08/thor-versus-hulk.html