Pollution blinked. Where most people lost in their thoughts would have jumped at the unexpected voice, particularly when it happened to be one he knew, he simply glanced up and...blinked. Then he smiled vaguely and shoved off from the tree a bit with a slight shrug.

"Possibly. If you're offering."

One thing about hitchhiking - you never expected to come across a familiar face. When you happened to, though, and the face was a relatively friendly one, you never turned them down.