Quickly, Rex eyes the man, trying to gauge how much of a threat he should consider him-- if any. The whole "crowbar" thing does raise his guard a little, since that isn't exactly something with good connotations. Crowbars call illicit activities, breaking and entering, to mind.

"No, I--" He knits his brow, like he's thinking, racking his brain trying to pinpoint where he knows him from... Nope, he's drawing a blank. "Sorry, I don't remember you." He's not sure if this is a case of mistaken identity or if he really did run into this guy before. The face is a little familiar, but that doesn't mean anything. He could've passed by him one day, seen him on the Network if were in the same cohort, done business while trying to find parts for his projects...

"You know how it is in a big city, so many people..."