Ted: Hey! It's your engine still running?
Janitor: Yeah, I let it run all day so I can leave the air conditioner on. That way it's nice and cool when I drive home. I got to gas up sometimes over lunch but it's worth it.
Ted: You have to see An Inconvenient Truth. It will change your life.
[later:]
Janitor: They're ruining the planet.
Ted: Yeah. [pats the Janitor on the shouler]
Janitor: Don't go! [grabs Ted's hand]