The Gamma Gambit
By: Jim Salicrup, Michael Higgins
Originally published: 1979
Yes, that’s right: toilet paper. This comic was printed on toilet paper. Back in 1979, you too could wipe your asshole with your favourite super-heros.
In this story, Spidey and the Hulk (in their civilian identities) are both watching a radiation demonstration when in bursts the Leader. Both heroes fight him and then go on their separate ways. The story was short, simple, and fun. And it was printed on toiler paper.
This is definitely not in the correct spot. In it, Peter doesn’t know that the Hulk’s alter ego is Bruce Banner. This means it must come at least before Marvel Team-Up 53.