He doesn't know what started the commotion, but he does see the girl darting around in the middle of it. He doesn't know who she is, either, or have any idea that she's the one Finn organized the rescue mission to find. She's quick on her feet though, and probably good in a fight. Information that he stores away in case it's ever needed.

"I am. The best in the resistance." It's not bragging. It's a fact, the one that caused him to be selected to go after the information that could lead General Organa to Luke Skywalker. A fact that even Kylo Ren had picked up from somewhere.