This is not a conversation piece

What is it about doing work on the bus or skytrain that makes people think you want them to ask you about it? Do you think if I had time for a little chit chat I'd be doing my work on transit? I'll give you a hint: probably not. I'm probably up against some sort of deadline or on a roll with some train of thought and need every second to try to finish my work. So no, I didn't just bring out these papers so you'd have something to ask me about as a conversation starter. In fact, from now on, let's just assume that if I want to start a conversation with you, I'll do something crazy, like say 'hi'.