For those cool enough to be in the loop, Secret Cinema has been quietly revolutionising the cinematic experience across the capital this summer, holding screenings of genre movies in unique and fitting locations.
Revellers arrive unaware of the film they are going to see, led to the location only by a series of clues leaked through the Secret Cinema website, Facebook and Twitter.
The previous event turned out to be an outdoor screening of The Warriors
at London Fields, where 2,500 cinephiles and cool customers arrived to find the venue transformed in the image of New York's Coney Island.
TotalFilm.com is all for this guerilla approach to cinema, and so we were giddy as schoolgirls to discover the Secret Cinema folks are holding a special Halloween event somewhere in this fair city.
So where is it? And what is the film? Ah, well that would be telling.
What we can tell you is that the screening will take place, surprisingly, on Saturday October 31st, and it'll be in London.
We can also reveal that Secret Cinema have set up a partenrship with Windows Mobile and will be loaning handsets to a selection of guests, allowing trick or treating revellers to interact via live mobile streaming and share photos and video via social networks.
The as-yet-unannounced venue will be dressed up in the appropriate theme, and the organisers are even providing Halloween get up for the lucky revellers who manage to string together the clues.
Previous screenings have included live re-scores, special guest appearances, artist's installations and performing bands and DJs - so sign up, follow the clues and expect the unexpected.