I've wondered how he does this too. He alludes to it "go back to the same place every day for weeks at a time". But he doesn't really go beyond this. I need to

I've wondered how he does this too. He alludes to it "go back to the same place every day for weeks at a time". But he doesn't really go beyond this. I need to remember to ask for an article that goes into more detail about his approach. It could be that he's just very gregarious with strangers - don't really know.