my chinese teacher is secretly a ninja

I was sitting around today in the FLL, and it occurred to me that my teacher was a ninja. or something like that. He's been to China a lot, so maybe he picked something up there. I'd be walking along in Morris, completely alone and suddenly I hear a quiet 冯照宁，你好。I turned around and there he was! I still can't figure out where he came from.... He's very good at quietly surprising us. I put two and two together, and realized that laoshi is a NINJA!