Ha... I live in Waltham right on the edge of Newton and I think I saw the guy and I assumed it was just a new fangled baby Bjorn. At the time I just assumed the

Ha... I live in Waltham right on the edge of Newton and I think I saw the guy and I assumed it was just a new fangled baby Bjorn. At the time I just assumed the baby wasn't attached. If I lived somewhere else it probably would have made a bigger impression on me but I honestly see weird devices all the time in the Boston area (particularly fairly bizarre recumbent bikes and skating devices particularly as you approach Cambridge).