Acquaintance: "Brian, if you ever need anything, let me know, okay?"
Brian's thoughts: "Sure, but you only say that to boast that you're a kind person. Sure kind persons don't always have to act right away, but I can sure as hell see you not being there for me.
I've had a lot of people say something like this to me, but I only know I'd be stalling their time or bothering them if I actually did ask for a favor or assistance.