- Despite being pretty sick, Spider-Man puts all his strength into one punch and knocks the Goblin away just in time to reach Gwen.
- Spidey's No-Holds-Barred Beatdown of the Green Goblin after Gwen dies. Keep in mind, Spidey is sick during this fight, and yet he manages to wipe the floor with the Goblin. He was that pissed.
- On a meta level, the fact that the writers managed to permanently kill a major character convincingly. Though as pointed out by Gerry Conway, the decision to kill Gwen was not especially controversial by the editorial staff.
- Gerry Conway was 19 years old when he wrote this story, and had the daunting task to follow Stan the Man himself as the writer of Spider-Man. That he stepped up to the challenge is already remarkable, that he did so with an era-defining story that showed that Spider-Man could continue without Stan and go in a direction entirely different from him but rooted in what he, Ditko, and Romita Sr. did is pretty great.
- Mary Jane's Character Development shows brilliantly when Peter, in his despair, lashes out at her and tells her to leave him alone. She refuses. MJ was already more popular than Gwen with the readers (that's the main reason Gwen was killed off, after all) but this was the pivotal moment that convinced Spider-Fans that she was Peter Parker's One True Love.
Awesome / The Night Gwen Stacy Died