First PTSD victim is... STEVE.
Disclaimer: I do not own Marvel.
The windows rattled as another bought of thunder shook the room. A person lying in bed jerked awake terrified. He looked around the room, but he didn't see a room, he saw a battle field. Soldiers were surrounding him, half of them dead. The other half were fighting for what was right. A brave man took another step towards the enemy line and BOOM, a bomb exploded killing the man and the others near him. Steve Rogers shook his head, knowing that this couldn't be happening, he was in his room he told himself, he was safe, the war was over.
"Captain Rogers to my understanding you are having a panic attack," said a voice in the wall called JARVIS, "According to multiple sources, you need to take slow deep breaths and remember that whatever you are seeing is not currently happening. Try to relax."
Steve listened to JARVIS and tried to breathe in deeply. Thunder shook the house again and cringed inward. He took another breath and tried to calm down. He kept reminding himself that he was in Avenger's tower. He was in his room. It was 2012. The war was over. He was safe. He was safe. He was safe. Steve started to relax as the battle field disappeared and the pale blue of his room started to appear. He put his head in his hands as his breathing evened out. JARVIS voice was still gently reminding him that the war was over and that it was 2012, trying to help him not enter his memories of the battles he had fought in.
When his breathing had evened out he stood up and walked over to the window to look at the city he lived in. He loved the view. Many thought he would hate it, but after living in a warzone, having so many people in one place was almost familiar. He did wish the skies were clearer, especially today. Steve had realized by now that the thunder had set off his panic attack. He would talk to Tony later about possibly making his room sound proof. Then he remembered JARVIS.
"JARVIS?" Steve asked.
"What can I do for you Captain Rogers?" responded the familiar AI.
"Oh, nothing, just, thank you for helping."
"You are welcome Captain Rogers, sleep well."