capntony:

Look closely at the moment immediately after Peter’s body disintegrates
into ashes. Tony slowly looks at his own hand, before the camera cuts to
his saddened expression. It’s not just shock from seeing Peter crumble
into dust that Tony is experiencing. Tony was waiting for himself to be the next one to disintegrate, and since he didn’t, he basically has a Fate Worse than Death. 

(x)