One of Spider-Man's most menacing villains, the Green Goblin was deadly not just because he possessed great strength and an array of terrifying weapons. He was also deadly because he knew Peter Parker's secret identity and just how to strike at him. His murder of Gwen Stacy is one of the pivotal moments in Spidey's crimefighting career, and when the Goblin got his comeuppance by accidental impalement on his own Goblin Glider, all was right in the world.
That is, until the hideous "Clone Saga" in the 90s decided that they needed a mastermind from Parker's past to drive the plot, and they settled on Osborn. How did he survive? That classic Marvel cop-out, a "healing factor." Blame editor Bob Harras for that decision. We're not even going to get into the retcon where Osborn knocked up Gwen Stacy and got her pregnant. That's even worse.
