I took a walk through Chinatown today and noticed this... it's not very often you see vertical add-ons like this, but I think it's interesting. The friends I was with today, whom aren't particularly into skyscrapers, even noticed it and wondered how a building goes about doing that. BTW, does anyone else find it semi-amusing that Tuft's whole dental and medical block in Boston probably has more square-footage and class space than Tuft's campus in Medford?