Milkman.. (TNMN)

You worked in an apartment, not so normal, you were a reception worker, your duty was to let your neighbors in but if they are doppelgangers you have to call the D.D.D., well, one day a milkman, his name was Francis Mosses, his face looked tired, you told him that he was not on today's list, he got angry, and with rage he said "Let me in.." he hit the glass furiously