In my house, we have two types of people, the ones that announce that they're about to walk up behind me and the ones that "forget" that I startle easily, something that comes mostly from my early-life Jersey City experiences and the rigor of vigilance that has formed my worldview.
That was brought up for me today by the announcement that they are remaking one of my favorite movies, The Warriors and an experience that I had.
(I have cleaned up the racist and homophobic language that I would have used at that age)