Prompt from KaMi-HiMe BVB. Iris, Eddie, Joe, and Barry are having a private party for Iris's birthday when some metahuman crashes the party wanting revenge on Joe for having put him or an accomplice (could be a brother) in jail. With his power the metahuman is able seal them in one room with no way out. Barry ends up saving the day while revealing his identity to Eddie and Iris.
Iris had a bad feeling about this birthday. Her father, Eddie, and Barry were planning something and she knew it. As secretive as they tried to be, she knew them all too well for them to be successful.
She wasn't uneasy about the surprise. No, something else was going on.
When she visited Barry at work he seemed distracted, but he smiled that smile that only he could give and wished her a happy birthday.
"Are you coming over for dinner tonight?" Iris already knew that he was helping plan a special dinner for her birthday, but she didn't want him to know that she knew.
The problem with knowing people so well that you can read them like an open book; they tend to know you that well too.
"You already know that I am. I wouldn't miss your birthday for anything."
"Is everything okay, Barry? You keep looking at your work."
"Yeah sorry. It's just . . . one of your Dad's old cases. One of the more violent people he arrested broke out last night and I want to get everything settled before your birthday dinner."
"Okay. I'll leave you to it then."
"Barry, any progress?" Eddie called as he walked in. "Hey Iris, can't wait for tonight."
Iris chuckled silently.
"Get back to work you two."
"Bye Iris." They called at her retreating form.
Joe was beyond mad. He knew that this particular criminal hated him more than any other. Why did this have to happen on his baby girl's birthday?
He knew he wouldn't be able to relax until this criminal was back behind bars, but he knew that it was unlikely to happen before Iris's "surprise" dinner.
Joe was right, pyromaniac Zach Harris was still free by the time he had to leave the station to be on time for dinner. As it was he had to let Barry borrow his car and pick up Iris to take her to the restaurant.
Joe was still worked up about the case but he made it through dinner without causing a scene, so he thought he was doing pretty well.
Iris's conversation with Barry at the station and how tense her dad was added to her earlier uneasiness, but she tried to let herself have a good time. It was her birthday for goodness's sake, she would enjoy it. She had her three favorite people around her.
When they arrived back at her house, they ate the cake (store bought as none of them were particularly good at baking). They spent several hours playing games and talking. Iris even got away with talking about the Flash without a lecture. She was once again baffled by how uncomfortable Barry was with the subject, but he let her talk.
"Did you invite someone else?" Iris asked.
"No why?" Barry asked suspiciously.
"It's probably nothing. I just thought I heard the door open."
"You three stay here." Before Joe even got up the fire alarms went off.
"Harris." Eddie stated. There was no denying it.
Barry checked the doors. "Joe, he melted the handles. There are fingerprints in them."
"Are you saying what I think you are? Because I really hope you aren't."
"No such luck." Joe sighed his kids and his daughter's boyfriend were stuck in a room with an insane metahuman with a grudge against him.
Iris screamed. Her mouth was immediately covered.
"So this is the cop's daughter. Hello detective." Zach Harris gave him a cruel smile. "Long time, no see."
"Let my daughter go." Joe started walking toward the desk where he kept a spare gun.
"Don't try anything stupid." Harris lit his hand on fire and held it close Iris. "You wouldn't want me to mess up this one's face.
"You son of a-" Eddie started.
"Now, now. The deal goes for you too." Harris snarled.
"Enough." Barry said. "You don't want to do this."
"You don't get it do you?" he gave a small laugh. "I'm not using any tools to light this fire. It's just me. I am fire. There is nothing you can do to stop me."
"Actually, a lot of things counteract fire. You can smother it, throw water or baking soda on it, use a fire extinguisher, or a few other things."
"Enough, why does a beautiful girl like you keep a nerd like that around?" He moved his burning hand closer to where Iris was, but she was gone.
Barry set her down behind Joe.
"I said enough." Barry narrowed his eyes.
His glare had little effect on the other metahuman. Zach Harris lit himself on fire.
Barry ran in small circles around him. Zach pushed the flames out further trying to get him to back off, but slowly the flames went out and Harris fell to the ground.
"How-?" Eddie asked.
"The tight circles cut off his air supply, smothering his flames and making him pass out. I need to eat something." Barry looked like he was ready to pass out.
"You didn't eat Cisco's calorie bar today did you?" Joe asked his kid.
"No,"
"Why are you guys talking about food? Look at him he needs to get to the hospital!" Iris shouted looking at the left side of his body. He had been badly burned.
"Iris, its fine, it'll heal."
"Barry, burns like that barely heal with medical attention. Maybe Caitlyn and Dr. Wells can do something about it?" Iris was still panicking.
"I heal fast, and I get burns every time I run without the suit. Though usually I don't have to heal from the smoke inhalation too, so it might take a little while longer."
Barry treated the whole situation like it was normal which, Iris guessed, it must be, at least for him.
"What else can you do?" Eddie asked with childlike amazement.
"If I have enough space I can make a sonic boom. I can vibrate my vocal chords to change my voice." He demonstrated the last one making Joe laugh and Iris glare. "Iris already knows about that one. I can run on water."
"What's your top speed?" Eddie prodded.
"The fastest I've gone so far is moch 1.1, which is a little over 800 miles per hour."
"Whoa. Is that how you punched through the punching bag?"
"You did what?" Iris finally pulled through her shock.
""Yeah, I didn't know I could do that. That was before I really had to speed punch people."
"How many people are there that are . . . like you?"
"The term is metahumans, and we don't really know."
"This has been a great interview, thanks!"
"Do not post this, Iris!"
"I know. I think it's safe to say this has been the most eventful birthday I have ever had."