With Thanksgiving right around the corner, and Bart trying to figure out what to do about Kara (did he ask her to go with him to Jay's? Did he not? And where was Billy when he wanted to ask him about these things?), Bart had been running back and forth between Metropolis and Keystone, trying to work up the nerve to ask Jay about bringing Kara to the Flash Family Thanksgiving-- every time he thought he was going to do it, he found himself running back to Metropolis without a word... whoops.
But this time when he started to make the run back to Keystone, something exploded in Gotham. Immediately he changed his course and went back, slowing to a complete stop right next to a short-ish kid with dark hair who had a kinda familiar jaw line?
"Hey, what was that? What are they working on over there? What exploded? Are you okay?"