In the midst of declining an invitation to a Police Gala, a notification buzzed Parker's phone. Iris had posted something new on her blog. One look at the title had her stomping to the Cortex. 

"Hey, Parker," chimed Barry.

Eyes on the cell phone in her hand, Parker sauntered in circles around Barry.

Cautiously, Cisco and Caitlin stepped away. 

"'I have information about someone you're looking for. He came here. You know where to find me,'" read Parker. 

Barry's mouth opened, not in shock, but anticipation, in case his brain thought of anything to say that wouldn't make the situation worse. He decided to keep his mouth shut.

"I thought me joyously rearranging your shoulder proved that you're whole 'we're mad at each other' with Iris was a crap idea," snapped Parker, strangely calm, despite the venom in her voice. "You're putting her in more danger by even condoning this! You have to think before you agree to this, Allen. For her safety, please."

××××

Parker curled into her computer chair. She read, without interruption, until she heard a beeping on the computer screen. The red dot that signified Barry's location moved through the streets, away from the Cortex, to a remote place in the depths of Keystone Ironworks.

"Goddamn it," she cussed, tossing her book on the desk. She hooked in her earpiece. "Barry, what the hell do you think you're doing now?"

Cisco and Caitlin heard her voice. They entered into the Cortex. 

"Dude, don't run angry. We don't know how to defeat him yet," said Cisco. 

"Who's he running to?" asked Parker, letting her finger off the speaker. "Tony Woodward?"

Caitlin nodded. "We gave him some information about where Tony might be, and--"

"This is definitely the place."

"Barry, I need you to stop. I need you to come back here right now, before--"

The echo of his abrupt scream pierced their ears. 

"We have to go," decided Parker.

"What? No, we--"

"We have to help him!" yelled Parker. She snatched a pair of keys from the hook. "Now, are you coming or not?"

xxxx

Upon arrival to the trashed warehouse, Parker clapped her hands a few times, seeing if someone would step out and address her.

The place stayed silent.

On parts of the floor that were relatively clear, she stepped carefully. With each step, she patted the scattered items lightly with her foot, just to be sure she wouldn't step on Barry.

"Over here!" called Cisco. 

Parker hopped over the piles of junk. She kicked a few beer bottles out of her way, then crouched, rested her bottom on the back of her heels. She laced her fingers in the creases of Barry's extended hand. 

"Allen, you're a dumb ass," she lovingly whispered. "Just let me know you're okay."

"Ow."

Parker started kicking a path clear. Clinks behind her told her Caitlin was helping. She slowed down. 

"At least he's all right," sighed Caitlin. 

"Doesn't mean we're out of deep shit. His actions are going to get us screamed at by Dr. Wells," said Parker. 

"Can't you think of anything positive to say?"

Parker raised her brow. "Not today... We're really breaking you out of your shell, aren't we?"

"Park--"

"Let's just get Barry back to the Cortex, yeah?"

××××

"What were you thinking? What were you thinking?!" asked Dr. Wells. "I told you that we would find a way to deal with him!"

Pitifully, Parker and Cisco watched Barry. Parker truly believed for a second that Dr.Wells would run Barry over with his wheelchair.

"I'll heal," said Barry. 

"You can't heal when you're dead. He could have killed you."

"I know, all right? I know!" shouted Barry. "In the past thirty-six hours, I've had my ass handed to me twice by the guy who tortured me as a kid. I couldn't stop him then, and I can't stop him now. Even with my powers, I'm still powerless against him!"

"Not necessarily," said Dr. Wells quietly. He ran his hand over his face, waving his hand loosely in the air. "Any material, if struck at a high enough velocity can be compromised."

"We did an analysis on the metal in Tony's footprint. Based on it's density and atomic structure, if you impact it at just the right angle, at just the right speed, you could do some serious damage," explained Cisco. 

"How fast would I have to go?"

Cisco bopped his head, muttering, "Factoring in the metal's tensile strength, estimated dermal thickness, atmospheric pressure, air temp... you'd have to hit him at approximately... Mach one-point-one."

"You want Barry to hit something at eight-hundred miles an hour?" asked Caitlin in disbelief. 

"Eight-hundred and thirty-seven, actually," corrected Cisco. 

"That's faster than the speed of sound!"

"I know. He would create a sonic boom, which, as I said before, would be..." He kissed his finger tips and released them to the air, his eyes shining bright with emotion. 

"Pretty damn awesome," admitted Parker, tilting her head. 

Barry pouted at her. "I've never gone that fast."

"Yet," said Dr. Wells. 

Caitlin stared at the team. "I can't believe we're actually entertaining this idea! He would need a straight shot from miles away!"

"Yeah. Five-point-three miles, theoretically," said Cisco.

"Do it right, you'll take him down," tempted Dr. Wells. 

Caitlin took a step closer to Barry. "Do it wrong, you'll shatter every bone in your body."

XXXX

Due to an "off the market" buy by Cisco, S.T.A.R. Labs was granted with forensics tech that constructed a 3-D model a face, then ran it through several databases for a name to match. Parker claimed it the second Cisco explained what it did. 

For hours, while Cisco and Caitlin played with a simulation for the supersonic punch, Parker played with the Facial Recognition Software. She drew sketches by hand, then showed them to the camera, and giggled profoundly when matches came through. 

"Okay, Parker, watch this, I think this is the one," said Cisco. "When you adjust the impact angle by point two degrees, up the speed to eight-thirty-eight... Bam!"

The model of Barry collided with Tony. He disintegrated. Tony was left standing.

Caitlin glared at Cisco. 

"Ouch," was all he could say.

"Wow. Uh, I think I might be on Little Miss Sunshine's side right now," said Parker. 

"Parker," sighed Caitlin. 

"Guys, you there?"

Parker's finger hit the button. "Yeah, we're here," she said. 

"What's up?" asked Cisco. 

"Tony took Iris. I need you to do whatever you can to help me find her. Satellites, security cameras, hack them all," pleaded Barry.

"We'll get right on it," assured Parker. 

She, Cisco, and Caitlin went to work on finding Iris. By the time they located Iris, discovered she and Tony were held up at the school, Barry knew already. 

Caitlin brought his vitals to her screen. 

Cisco displayed the city map. 

"He made it out..." breathed Cisco, his finger tracing along the screen. He looked to the vitals screen. "...barely."

"Why did he stop?" asked Caitlin. 

"He's miles away," noticed Cisco. 

Parker adjusted her glasses on her nose. She tapped the computer screen twice, highlighting the school and where Barry stopped. The computer measured out the distance between the two.

She nervously chuckled. "He's five point three miles away..."

Parker locked her hands, both index fingers resting on her mouth. Her eyes were squeezed shut. On her knee, Cisco placed his hand, stopping her foot from tapping. 

"Barry, wait!" cautioned Caitlin. 

"No way," whispered Cisco excitedly. "He's gonna do it. Go, man, go!"

Emotional silence filled the line. Through the earpiece, a clap was heard.  

Cisco jumped up, his chair being thrown back into the wall. "SUPERSONIC PUNCH BABY! WOOOOO!"