Ghostly Graffiti

In the better-late-than-never department: I was amused to find this graffiti on Wednesday near Trellick Tower. Halloween is not as big in the UK as it is in the United States -- we had no trick-or-treaters, I saw no jack o' lanterns, and I spotted only one or two other spooky decorations -- but clearly it's on someone's radar! (Judging from the "NYC" on his piece, Acid, at least, may be an American.)