The voice is familiar but different and Hart looks up, recognising the sign of someone vibing. Of course he does, he was married to Reverb. His hand tucks the ring back under his shirt without even thinking about it, because there's a reason they had always worn their rings as necklaces, other than how a ring on his hand messed with Paco's powers. Nobody could know about him, nobody could know the weakness. For all the good that hasn't done.

His eyes focus on Cisco and not even for a second does he delude himself into thinking it's Paco. Paco doesn't talk like that. Paco never wears his hair like that or dresses like that. Paco's emotions don't show themselves like that and Paco is more built than this doppelgänger. Paco is dead. This isn't Paco.

Just another him from another world. Hart is a scientist and he's studied Paco's power, he has helped him with his glasses. He understands.

"Where--" He interrupts himself to cough. He hasn't talked in a while, his throat is dry. Not much to drink here. "Pardon me." Paco would have mocked him for being polite even now. "Where are you from?"