lol, I think that same dude did that to me when I was on the treadmill. I was 45 mins in, so I'm pretty damn tired, and in NO MOOD for chit-chat. He meanders over... "Hey, how come you're not smiling?".
I'll kill you.
Then "So what times do you usually come to the gym, I haven't seen you here before". (Note to self: Never come at this time again)
Normally, I'm a friendly person..but this was just too much. Grr!