Perhaps in this fanfiction, Peter has some new power or gadget that he's testing. So when he jumps off the building, instead of the usual web - swinging, he activates this new ability which allows him to fly or at least glide to the ground in a very cool and unexpected way.
One possible reason could be to save someone. Maybe there was a threat in the building that he could only stop by jumping off and using his powers in mid - air. For example, a bomb was about to go off and the only way to defuse it was to jump from a certain angle.
Well, one possibility is that Spider - Man's friends, like Ned and MJ, would quickly realize he's missing. They might start their own investigation, using Ned's tech - savvy skills to try and track Peter. Maybe they'd find some clues that lead them to one of Osborn's secret lairs. Another thing could be that Peter manages to break free on his own using his spider - powers and his wits. He could then turn the tables on Osborn and expose his evil plans to the public.
Well, it could also lead to a rescue mission. The Avengers or other superheroes might find out about Peter's kidnapping. They would then come together to form a plan to rescue him. This could involve a lot of strategizing and fighting against Thanos' forces.
Well, one possibility is that the Avengers will quickly notice Peter's disappearance. Tony Stark might use his high - tech resources to track him down. He could analyze any evidence left behind at the scene of the kidnapping. For example, if Peter's Spider - Man suit has some sort of tracking device, even if Hydra tried to disable it, Stark could find a way to reactivate it or use its last known location to start the search.
Peter's own quick thinking helps him survive. He could use his surroundings during the fall. For example, if there are ledges on the building, he can use them to break his fall. He can also calculate the best way to land, using his acrobatic skills that come with his powers, so that he minimizes the damage to himself.
One possibility could be that Peter is extremely stressed at school. Maybe he's being bullied or facing overwhelming academic pressure. So, in a moment of despair, he jumps off the school roof. But then, he could miraculously survive and this event could be a turning point for him to face his problems and seek help.
Another thing that could occur is that the public's perception of him would change drastically. Some might see him as a hero, but others could fear him or be angry that he's been hiding his identity all this time. There could be protests or demands for him to be regulated in some way.
Well, Tony might get angry at first. He's used to being in control and having his orders followed. But then he could also realize that Peter has a point. Maybe they would have a big argument that leads to Peter leaving the team or Tony having to re - evaluate his plans.
In a fanfiction scenario, it's also likely that he discovers a new community of omega superheroes or mutants. This new community could teach him about his omega nature, its strengths and weaknesses. They could also help him develop new skills or powers that are unique to omegas, which would then help him in his fight against evil.
Peter might fall off the mountain due to being chased by a powerful villain. As he falls, he could be thinking about how he got into this situation and what he could have done differently. When he hits the ground (assuming he survives), he has to quickly recover and find a way to defeat the villain who caused his fall.