"I'm a speedster," Derek says out loud, mostly to confirm it for himself. He puts his hand over his own heart, feeling the thrum of it below his fingertips since he can't hear it. All of his senses are muffled and it's strange, like being underwater.

Barry's eyes are glowing red and Derek can see a hint of fang when his lip curls back in irritation. The full moon is tonight and wow, what a time to suddenly become a werewolf. Kicker is, Barry doesn't even seem to realize it yet.

"No, red like mine." He reaches for Barry's hand, gently uncurling it from where it's clenched into a fist. His fingertips are red, and Derek presses his thumb to a fingernail to coax out a claw. "I'm a speedster, and you're a werewolf. Do you feel it?"