cabs (redux)

so assuming you are in a cab and the cab driver is speaking in a foreign language. 9 times out of 10 this means he isn't talking to you, but about about that 1 in 10 time when you're not sure? when clearly his comment has something to do with the common situation you are experiencing (traffic etc) and thus a response would be apprropriate. And yet, how are you supposed to know what to respond given the language gap? And would he think it would be weird for you to respond, to enter his space, as it were? Should you laugh politely, say "can you believe this," "tut-tut" in a sort of british manner and shake your head as you absently play with your blackberry. What is the solution? More later, must go to meeting.