"...not...to talk to strangers who run around on rooftops?"

[He has no idea who you are or what's going on, but he's definitely alarmed by what you almost said, sir. Which might explain why he's suddenly adopted a posture that could only be a defensive one, and circles away from the edge of the roof. Just in case this guy was a little less than friendly.]

"Or is that just when one offers you candy? Or am I thinking of a completely different lesson?"