Bang!

Bruce jumped and dropped the test tube he was holding. The green liquid spilling over the white tiled floor, but he payed it no attention as he sprinted from the room towards the source of the commotion.

Once he'd reached the scene, he stopped dead. Gawping at the scene- or rather the person in front of him.

"Bruce!" Tony yelled across the room "Bruce! Bruce! Feel this right? How fucking hard is that?!" If Bruce was blind, a thousand of different scenarios would be running around his head. All least pleasurable than the next. So it was a sigh of relief as Tony stretched out his arm and lifted it upwards. A small ripping noise sounded and a tare began to creep along Tony's t-shirt over his bicep.

"How awesome is that? Oh my God I'm like Thor! Where's Thor? Thor I want an arm wrestle!" Tony demanded as he caught sight of the blonde God walking into the room, clutching a box of Poptarts and looking confused. The two men engaged in the arm wrestle on the coffee table. Needless to say, Thor won.

"You're not that much stronger Tony" Clint said, watching as the genius attempted to crush two dice. It was true. The guy now had some sizeable muscles, and maybe a slightly better six pack than the one he'd had before, but it wasn't much.

"Yeah I am. I saw that dude do it in that James Bond film." Tony grinned, but his face was going red with the strain on crushing two dice to dust.

"Am I the only one who wants to know why Tony is suddenly stronger?" Natasha wondered aloud, looking at the brunette who had now taken to trying to pick up Mjolnir.

"Yeah Tony, why are you stronger?" Bruce asked, as he carefully pulled Tony away from the hammer. He'd forgotten that it wasn't just heaviness that possessed the hammer.

"Honestly? I don't know. I just woke up and my pyjamas were ripped." Tony said seriously, looking at the assassin and the doctor.

"The great Tony Stark wears pyjamas?" Clint teased and Tony scowled at him.

"Only on Wednesdays and they have to be pink." He teased and Clint stuck his tongue out. "This is actually my fifth t-shirt this morning. I've spent the last half an hour standing in front of the mirror doing selfies." Tony grinned, flexing his muscles even more.

"Seriously Tony, what did you do?" Bruce asked, and Tony scowled.

"I told you. I woke up and my pyjamas were ripped. Nothing else to tell really." Tony replied shrugging.

Just then, the door was kicked open and a blonde muscle man walked in.

"Steve!" Tony yelled, beaming at the captain "you, me, arm wrestle, now!"

Steve stood in shock, as Tony bounded happily over to him.

"Are you okay?" Steve queried, looking at the man who had now given up on the idea of an arm wrestle and was trying to standing on his tip toes trying to reach Steve's height.

"I'm the same height as you now! This is awesome!" Tony laughed as he swayed slightly, trying to remain balanced.

"No you're not. You're standing on your tip toes." Steve pointed out and Tony fell back onto the balls of his heels.

"Way to kill the mood Captain gosh." He sulked.

Tony walked across the room and stopped to go in the kitchen. He paused when he got to the toaster and surveyed himself in the shiny surface.

In all honesty he didn't look that different. His muscles were just a bit bigger, but not by much. No where near enough to rival Thor, but he had hoped maybe he'd be slightly better than Steve. But maybe that was just wishful thinking. He quickly whipped up a banana smoothie before leaving, slurping happily at it through a massive straw.

However- a thought suddenly occurred to him and he stopped dead.

"Tony? Tony what is it?" Steve said, rushing over quickly as the smoothie slipped out of his hands. Steve was worried. The serum might be doing something else. He was happy it was only a few extra muscles, but it might not yet have finished. Tony remained frozen on the spot, before cursing.

"Shit." And fled from the room. Steve exchanged glances with Bruce as they heard Tony slip and slide along the marble corridor to wherever he was going.

"Someone better go after him." Steve said, but he'd already left. He and Shield were the only ones who knew about the serum after all.

Steve jogged along the corridor, using Tony's footsteps as a guide, ears pricked just incase.

He stopped as he reached a door to a room he'd never been in. Bruce had told him before that the tower was like a 'TARDIS'- whatever that was.

He slowly pushed open the door, which Tony had forgotten to lock behind him, and stepped inside. His jaw dropped.

There were Iron Man suits every where. But the weird thing was they were all sitting down, doing normal things. They were stationary, yes. Sitting on the sofa, playing poker, it was just, weird. His ears picked up a sound coming from a back cupboard, and he walked slowly over to it.

"Tony..?" He started, but Tony's heavy breathing cut him off.

"I... Can... Do... This!" Tony said, heaving slightly.

"Tony open the door!" Steve was getting worried now, as he listened to his friend, or was it son? Heaving inside the cupboard. He tapped his ear.

"I need medical personnel here at once." He carried on trying to prise the door open. In the end he took a runner at it, sending wood chips and splinters every where.

Inside he found Tony, doing what he didn't expect him to be doing.

The man was panting heavily as he tried to put on the Iron Man armour.

"Why are you doing that manually?" Steve gasped, relieved. He'd feared something had gone wrong. Happiness was rushing over him as took in the fact that Tony was okay.

"This.. Is my Suit that's meant for big people. Like you or Thor." Tony told him.

"You built me and Thor a suit?" Steve blinked.

"Well, yeah. I built Clint and Natasha one too." Tony shrugged, then seeing the perplexed look on Steve's face he added "I got bored."

"I thought only you could have the suits." Steve said, wonderingly.

"Not true. I can build them whenever I want. For whoever I want." Tony replied, he had managed to put the suit on now, and was swearing colourfully. "Ow, shit, ow, ow, ow! Urgh!"

Steve paused again, panic bubbling again beneath his skin.

"What is it? What's wrong?" Steve asked quickly as Tony fell out of the suit again, still swearing.

"I'm still too friggen short. My balls were getting crushed." He scorned, glaring at the Captain. Who couldn't help but smile.

"Do you think watching Lord of the Rings will make you feel better?" Steve grinned. Tony scowled.

"Are you calling me a Hobbit?" Tony scorned, looking death at Steve.

"Maybe." Steve joked, actually liking the films a lot more than he'd thought he would. Possibly because it wasn't relevant to his time, or this time. Either way, he knew Tony hated it when he got compared to a Hobbit.

"Well fuck you." Tony said jokingly, sticking his middle finger up as he walked from the room. "I'm going to see why I'm like this." He gestured at himself, before turning around again "you don't know why I'm like this, do you? It's great and everything, but it's still a little creepy." Steve took the reaction that came naturally, and shook his head. Tony left, shrugging and patting one of the papier-mâché suits on the head. Steve bit his lip as he realised they were from an art show.

"Are you sure that's a good idea?" Steve called after him, and he cringed as he heard the footsteps suddenly stop.

"What?"

"I mean... Maybe all your working out has finally payed off?" Tony drew closer to him, scowling.

"What aren't you telling me Captain?" He asked, looking reproachfully at the blonde, who was trying with all his might not to tell him what Shield had done. What Howard had done. If Tony found out about the serum, what kind of mess would Shield be in then? What kind of mess would he be in?

Love it? Hate it? I didn't make him evil! He's Tony still! But he may have been a bit hyper in this chapter.. I mean, if woke up stronger you'd be pretty psyched too right? So yeah, next chapter tomorrow? Maybe? Thanks for reading! :D