Barry's eyes widen and he's fully willing to accept that explanation until Jim smirks and Barry realizes it's a joke and he laughs, a bit embarrassed.

It isn't that he's fully gullible, but this is Milliways, and well, something like that isn't entirely out of the realm of possible here.

"Microverse, okay." He'll definitely be asking her about that next time they meet. For now, though, Jim still has Barry's interest with the physics thing.

"So are you a scientist, or a professor?" he asks, then offers, "I uh, I majored in physics and chemistry in college, and I work now as a forensic scientist for the police department."