why did Spiderman feel something while others simply disintegrated?

In the scene spider-man takes longer to evaporate then all the others, unlike black panther who completely vanishes in seconds without saying goodbye spider-man feels something bad before holding onto tony as he slowly disintergrates. green arrow black canary cosplay

The reason for this from a creative stand point could be down to the physical effects of spider-mans’ powers. So his healing factor was fighting against the effect of the gauntlet before failing or as he says in the scene he just really didn’t want to go. His instinct to stay alive was so strong that he held on just for a few more seconds. space battleship yamato cosplay

The reason for this from a business stand point is entirely for tony stark’s reaction. No-one on team iron man other than peter actually had a relationship with tony stark so like with captain america’s reaction to Bucky dieing we get to see the horror on Tony’s face as he realizes that he put peter in that situation, separated him from his aunt and most importantly failed him as a hero. Spider-man says “i’m sorry” but tony believes he should be apologizing to peter for failing as a hero, a mentor and as a father figure.injustice joker costumes

The in-universe answer, if you want it to be: Spider-Sense. Because of Peter Parker’s Spider Sense, he was aware of what was happening to him in a way no one else was, and so he had time to feel it (“I don’t feel so good”) and react to it that others did not have. We’ve heard from behind the scenes that these lines were improv, so I’m sure this was not in the directors’ minds at all when filming this scene, but I think it's a perfectly good way to explain it if you’d like to have one.

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