The author could describe it as a moment of complete vulnerability. His eyes might be red - rimmed, and his face contorted with pain. The sobs could be racking his body as he finally lets out all the pent - up emotions that he has been hiding for so long.
Maybe it's described as a very private moment. Tony might turn away from others, trying to hide his crying. His breaths could be ragged as he struggles to compose himself, but the tears keep flowing, betraying his inner turmoil.
One possible scenario in such a fanfiction could be that Peter is crying because he misses Tony Stark after his death. Tony was like a mentor to Peter, and his absence leaves a huge void. Peter might be in the Avengers compound, looking at old photos or mementos of Tony, and the memories make him break down in tears.
One interesting fanfiction could be where Tony Stark cries after realizing the true cost of his superhero lifestyle on his personal relationships. He might break down when he sees how his actions have pushed away Pepper or Rhodey.
One possible scenario in a fanfiction could be that Peter Parker is trying to hide his emotions from Tony Stark. Maybe he's been through a tough situation at school, like being bullied, but he doesn't want to seem weak in front of his mentor. Tony, on the other hand, has his own issues with showing vulnerability. He's always been the strong, confident Iron Man. But perhaps he starts to notice Peter's struggle and tries to open up about his own past traumas to encourage Peter to let it all out.
One reason could be the loss of a close friend like Steve Rogers. Their complex relationship and the times they fought side by side, if Steve were to sacrifice himself, it would be a huge blow to Tony. He might cry out of grief and also regret for the times they had disagreements.
A reason could be that Peter is reminded of Tony's last words to him. Those words were full of hope and trust in Peter. When Peter reflects on them, he is overcome with emotion and starts to cry as he feels the weight of Tony's expectations.
One popular fanfiction site is Archive of Our Own (AO3). You can go there and search for 'Peter Parker crying over Tony Stark' to find relevant stories. There are likely many works that explore the emotional bond between them and scenarios where Peter might be crying over Tony's death or other significant events in their relationship.
The theme of legacy is often present too. Peter might be crying while thinking about how to carry on Tony's legacy. He may feel the weight of living up to Tony's name and the expectations that come with it. Fanfictions may delve into Peter's internal struggle as he tries to figure out how to be the hero Tony believed he could be, all while dealing with his own emotions.
In fanfiction, Tony Stark's breakdown can often be triggered by his complex past. His experiences in the war, his guilt over the weapons he once created, and his constant fear of not being able to protect those he loves can all contribute to it. For example, in some stories, the death of a close friend like Rhodey might send him into a downward spiral of self - blame and despair.
In a lot of fanfiction, the concept of Tony Stark as a technopath is used to enhance his already brilliant technological mind. It gives him a sort of superpower within the context of the story. This can lead to all kinds of exciting plot developments, like him being able to instantly diagnose and fix complex technological problems just by thinking about them. It also allows for some really creative interactions between him and other characters who may be in awe of this ability.
Yes, in some fanfictions, Tony Stark can be depicted as a demigod. Fanfiction writers often take creative liberties and blend different mythologies or concepts. They might give Stark powers or a lineage that makes him a demigod. It adds an interesting twist to his character and can lead to unique storylines.