Piano trap

Fun test to see. Researchers seek ways that more people took the stairs instead of the escalator. a better choice of health considerations. The researcher slightly adjusted the subway station in St...
Fun test to see. Researchers seek ways that more people took the stairs instead of the escalator. a better choice of health considerations. The researcher slightly adjusted the subway station in Stockholm Odenplan . There is piano music from the keys (steps). a nice interaction between man and computer. The study showed that 66% more people than normal chose the stairs over the escalator.