3.
They'd thought he'd be able to handle a little water, and Tony did too.
Apparently the obviously creative Doom decided to it was a good idea create a giant shark-squid hybrid...thing, (ooh, he was going to get a nice repulser to the face next time the billionaire saw him) and it was currently wrapping one of it's blue, rough tentacles around that nice theater Tony rented out sometimes.
He was not gonna take that shit, no way, so he blew up the apprentage. Then shark-squid was everywhere and Cap was yelling in his ear about getting creature shit all over the streets, and did he know how long that would take to clean up? Tony had automatically calculated it to the last second (six days, five hours, three minutes, and twenty six seconds.), but he just responded with some half-assed pun.
But then apparently the thing was also part starfish too because it grew it back, and Tony just cursed and fired at it again. But then the fucking brand new tentacle wrapped around his torso, pinning his arms. The pressure it applied assured him that he was, in fact, getting crushed like a tin can. The creaks and the groans from the armor weren't telling him any differently. His sight was filled with red warnings, and his ears buzzed with worried exclamations from the team.
There was a sharp crack, and pain in his right arm. Tony thought (and maybe said, he wasn't sure), fuck, because he was 87.527% sure it was broken, the other 13.483% being a fracture. He was okay with that, he'd been through worse.
But then, the screen went dark and JARVIS was oddly silent, then the cold, murky water entered his suit and he was there again.
He said yes already, why wouldn't they stop?! It was cold, so cold, and it forcefully entered his throat and lungs and ears and god he couldn't breathe and it hurt so bad and so much water, water, water and god, somebody come help him, please, and it was getting dark now, so dark, and he welcomed it.
When he awoke, it was to the smell of sanitizer and bandages. There was a cast on his arm, and what he assumed were IVs in another. There was something up his nose. He then knew it was safe, and opened his eyes to white walls and white sheets and stiffness in his legs.
Then Pepper, and oh god, it must have been bad if her mascara was smeared, and she through her arms around him and sobbed about what an idiot he was.
He pretended that he didn't see Bruce and Steve lingering in the doorway or Clint in the air vents or Natasha in the corner or Thor out the window. But then there was a voice in his ear.
"You should have told them about your PTSD."
Tony remained silent.