“GET BACK”, I scream at the top of my lungs, as I’m slowly shuffling backwards, away from the man facing me on the 7th floor landing in the council estate. Behind me is the stairway I just came up. To the right of me is a low black railing and a 70-foot drop. In front of me is a Customer. He seems dazed, confused, and absolutely furious. Something has happened to him, and he sobs, shouts, mumbles, drools, spits, and shouts some more. The words “Elise” and “I’m going to fucking kill him” keep being repeated.