All the bathrooms at my work have those, and they are ultra-sensitive. YOu can't move, breathe, or blink, they just keep flushing. A lot of outside people come to our building for conferences, meetings, etc., and it cracks me up everytime I'm in one of the stalls, and hear women come in, and immediately the toilets start flushing, and they're all trying to talk over the flushing, and then they get more and more exasperated. I take care of the problem by hanging a piece of toilet paper over the sensor...no more flushing.