because in a city like that there is a lot of ambient noise. anyone who isnt directly near you and sees to do it will chalk up that sound to ambient noise. stand next to two large suvs and the people on the other side of the street dont see you and dismiss the noise. look at everyone (other than the woman in the video) after this happened. they continued on with their morning commute as if nothing happened because they did not notice it. no silencer and the whole city block turns their heads to look
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