Mike,
If I see something weird while riding, I just keep going.
I really don't want to get involved.
I did get stopped on the bike path (oops! Well, I guess the cat's out of the bag) by a roller-blader yesterday, asking me where the path led to. I said, "Umm, I'm not sure." We stood there and looked at each other for a second, then split. That was pretty weird.