Secretly I am quite superstitious. I dont walk under ladders and I do (in my head) salute magpies. Also I once broke a mirror and really did have a bad run of luck lasting years, not too sure if it was 7 though.
Perhaps its is a matter of drawing connections between un connected things, coincidences really. For instance I was reading a book by Toby YOung and I turned the page and he mentioned Hugh Fearnley-Whittingstal, one second later H F-W appeared on the tv, just coincidence no doubt but for me it was 'spooky'.