[Iris is laughing because she's pretty sure if she doesn't, she'll cry. What's happening to her, it is amazing. Amazing and terrible and terrifying and wonderful and empowering and lonely. It's not like Barry's speed. The worst he could do by accident is knock someone over. She's killed people.

She might kill her family. Her friends. Her best friend.]

I can't always control it. And when I can-- You get a rush from saving people right? I get the same rush from punishing the ones that get away. You can't help with that.