Halloween movie involving a product that contains a gas that brainwashes
I have just had one of those flashbacks to a movie that I just can't remember and of course it's driving me nuts. After frantic searching on Google I have found my way here... I think it's something to do with Halloween, and the marketing of a product (possibly a toy) that contains a gas or substance that will brainwash/kill thousands at a particular time? All I can really remember is that this toy or whatever it is has its own advert with a really annoying cutesy repetitive jingle! For some reason four-leafed clovers figure, but that might not be right at all. If ANYONE has ANY ideas, I'd be grateful!
