Amazing Spider-Man (1963 1st Series) #79

"To Prowl No More!" Part 2 of 2. Script by Stan Lee. Art by John Buscema (layouts) and Jim Mooney (finishes). Cover by John Romita.

As shown on the frightening cover, Peter Parker falls out of J. Jonah Jameson's office window! But thanks to his ability to cling to surfaces...he survives! And after changing into his costume, Spider-Man welcomes the Prowler to the superhero vs. super-villain business! 

Cameo appearances by Gwen Stacy, J. Jonah Jameson, and Joe Robertson.