I will never forget about 10 to 15 years ago I was in a taxi and the driver started talking (I don't remember how it came up? We may have been in a traffic jam?) telling me about the "underground cities" and how you can drive from one area to another underground and how the military controls those areas because he used to be in the military.

I didn't know what to think at that time, but didn't take him too seriously. Now, if someone happens to start such a conversation, I would be more than interested and asking as many questions as I could.