I don't have access to the episode so the scene will be a little different.
Prompt from Future Olympian. (In episode 8) During Barry's fit of rage, he lowers his mask when he's attacking Eddie.
Solution to the problem is based off of something I saw on Tumblr.
Iris was confused. Nothing about this situation made sense. The Flash, a man she trusted, who had saved her life on multiple occasions, was attacking her boyfriend. There was one other thing she noticed; his eyes were glowing red. It was a different than the red that flashed through his eyes when he ran. It was solid instead of streak of lightning.
"Why are you doing this?" Iris demanded. "I thought- I thought you were my friend."
Barry's twisted mind didn't hear the hurt in his best friend's voice.
"You don't even know who I am. You never have, Iris!" The Flash turned to her for only a moment before turning back on Eddie.
Eddie was looking bad. He was bleeding from several parts of his body, and the Flash's attacks weren't slowing.
"Then-then tell me who you are. Let me know, let me help you. I know that this isn't you. Ever since you showed up all you have done is tie up criminals and save lives. You give hope. You have never been violent before now. What is going on?" Iris was desperately trying to get his attention away from Eddie.
"Maybe I decided I don't want people hunting me when all I've tried to do is help. I've devoted my entire life to getting people justice, helping them in any way I can, and he," he gestured to Eddie as he tried to get to his feet. The Flash kicked him back down, and Iris winced.
"Let me help you." She pleaded one last time.
The Flash pulled down his mask. Iris saw a face she had known her entire life and almost everything about the past few months since he woke up began to make sense, expect what was happening right now.
"Barry?" He looked Iris in the eye, and his eyes flashed back to normal for a split second. "You're not in control of your mind, are you?"
"What difference would it make?" He snarled in response.
Eddie had managed to stand during the small exchange. He couldn't make facial expressions very well due to how much damage his face had sustained, but Iris could tell he was surprised.
Iris stepped toward her friend.
"Iris, what are you doing? He's dangerous!" Eddie yelled.
"No, he isn't. He's Barry Allen. He had been my best friend for as long as I can remember, he has saved me from broken hearts, broken bones, metahumans, and car accidents. He will not hurt me even if he isn't in control of his mind." With each word she spoke, Iris moved closer to Barry, until she was close enough to give him a hug. "I know you're in there somewhere, Barry."
Barry's arms wrapped around the girl he had always loved and held her for a couple of minutes. Eventually she pulled back far enough to look at his face.
"Let me see your eyes." She told him.
She looked into those green eyes that told her the boy she had always counted on was back. He was in control of his head again.
He gasped and looked down at Eddie. "Wait here, Iris. I'll pick you up in a minute."
With that her best friend scooped her boyfriend into his arms and carried him away. Less than a minute later he returned and carried her bridal style to her boyfriend's hospital room.
Barry paced back and forth in the hospital room apologizing nonstop.
"Allen!" Eddie exclaimed. "I'll be okay. You weren't 'in control of your brain'. Though I'm still not sure how that happened and would appreciate it if you explained how that was possible."
Barry opened his mouth to speak, but Iris stopped him. "In English, Barry."
He chuckled at how well Iris knew him. "Another metahuman," Iris raised an eyebrow. "Another person affected by the particle accelerator explosion gained the power to make people incredibly angry for a limited amount of time by looking in him in the eye." Barry paused and looked at them both to see if they understood what he had said so far. "That's why the people in the bank turned on each other and why Joe's back up pointed his gun at the other officers. Because of my super speed the reaction somehow happened slower and affected me longer."
"I'm amazed how much explaining the science calmed you down." Iris laughed at her best friend.
"I'm amazed that you're calm at all. I tried to kill your boyfriend." Barry responded.
"You didn't, we've already established that it wasn't you. Not the real you anyway."
"Thanks."
"Barry, you might want to call Caitlyn. She's about to send a SWAT team looking for you." Everyone turned toward the doorway where Felicity stood.
"Yeah," Barry turned to call Caitlyn. Iris could hear Caitlyn yelling on the other end if the phone. "How did you find me? They know I'm the Flash so you can answer honestly." Barry asked when he came back.
"Can I watch everyone else's reaction to that?" Felicity asked teasingly.
"Haha. Can you answer my question, please?"
"Arrow found Iris's car abandoned with the window smashed, so he assumed you had taken them here, and snapped out of the angry hypnosis on your own."
"Technically Iris knocked me out of it." Barry shrunk into himself, freshly remembering everything he had done and said. He made a mental list of everyone he needed to apologize to.
"Just be back at the labs soon. We still have to catch the angry metahuman." Felicity called over her shoulder as she turned to leave.
"Felicity, wait." Iris called before she had gotten very far.
"What?"
"You work with the Arrow?"
"Yeah."
"Are you serious?"
"Yeah, that's the 'work' I had to call to see if I could stay for trivia night that one time."
"You'll have to introduce to him. Barry would be too afraid of my safety to even consider introducing me to another vigilante."
"He's not a very social guy, but I'll ask him." Felicity nodded.
"Arrow is wrapped around you finger." Barry mumbled.
"What was that Barry?" Felicity eyed him suspiciously.
"Nothing, nothing at all."
With that Felicity left, and the others slipped into a comfortable silence.