What does the speaker mean? [br] [originaltext]"I learned a lot of street smart

"I learned a lot of street smarts during the years when I had to walk through Times Square to my office every day. I walked with confidence, was aware of people around me and held on to my purse real tight."

This new kid looks like he is not all there. All he does is sit and stare out the window as if the only thing he sees is blank space.