Relooking you are right. I'm mixing the two stories together. Spider-man Annuel 3 i think he does not knock hulk out. He has hulk hit a gamma wall turning him back to banner. He could punch out banner but won't and banner turns back to hulk and spider-man tells him he does not want to fight and hulk is fine with it and walks off. The story spidey figures out fast hulk is too powerful.Hmm... never heard about that one. I know Spiderman punched Grey Hulk into orbit when he had the Captain Universe powers.
Ironic as the two would become friends years later in marvel team up.
The cosmic spidey hitting hulk into orbit scene i mixed up with that story.