In order to do a final battle with Spider-Man, the Vulture abducts J.Jonah Jameson and puts him next to a revolving pendulum. It's up to Spidey to stop the Vulture, otherwise his other nemesis Jamieson ends up in two halves.
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[after Vulture dropped dynamite which detonated near Spider-Man
That feathered fink sure lays a powerful egg.