In an alternate universe where Gwen Stacy wasn’t killed by the Green Goblin, Spider-Man saves her by choosing to dive off the bridge to catch her instead of snagging her with his webs, which snapped her neck in the actual 616 timeline.
NARRATION: For one fleeting instant time seems crystallized as a thousand possible courses of action flit through Spider-Man’s mind, his first impulse is to stop her descent with his chemical web —
— But, even as his middle fingers touch his web-shooter, that notion is dispelled by a tiny mote of caution. The next moment, the reality which we are familiar is no more …
SPIDER-MAN: Leg muscles, don’t fail me now! Gwendy’s only chance is for me is to reach her before she hits — which isn’t going to be easy, what with her head-start!
NARRATION: His powerful leg muscles propelling him downward. Spider-Man pours every erg of his being into overtaking the falling figure …
SPIDER-MAN: I - I’m doing it!! GOT HER! Now if I can snag the nearest bridge pylon with my trusty web, we’ll be home free!