I have to say I'm an asshole when it comes to movies. I don't want ANYTHING to alter my perception of the film, so food is not allowed, neither is drink. Water, at most. If you make noise next to me in the cinema you're sure not to leave the room ever again. Nobody will find your body, I promise.
There are exceptions, though. Films of which I already know they're shallow and just for laughs, I can have anything. Mind I'm not talking about bad films but fun films. Like Braindead, for example.
