See, you say this because you don’t travel with Someone Nice Who Makes Eye Contact. Who is chatting away with someone (or, more frequently, being chatted at) when you try to get her attention.
ME: What was that about?
SNWMEC: I have no idea. Did you need something?
ME: I just wanted to show point out the really exotic barns we were passing.
SNWMEC: (peering out window) Where?
ME: Ten miles back.