Eat Turnips instead!
I work at a canteen in the school gym and I know how they make popcorn at the movies, sporting events, etc... In addition to the kernals, there is a powdery salt for flavour, and the 'butter' is just flavoured oil - and probably the worst type. No extra virgin olive in site.
If you're going to the movies, I highly suggest you smuggle in some popcorn from home, or maybe a bag of the white cheese popcorn, if that is any better. Trust me when I say that the great smell you are smelling is nothing more than melted lard and salt.
Maybe chips and salsa is better - still fat in the chips, but at least not the horrible pure fat of the movie popcorn, and you get the goodness of the salsa. Or maybe cheese and crackers. Don't be duped by ads at the theatre advertising Becel or another low fat margarine product. We all know what's really in that stuff, and low fat butters are not good for melting on popcorns, so its almost guaranteed full fat.
I just thought I'd post this editorial here for all to read! Of course, plain popcorn, or even with a little butter, made at home, is usually fine for a treat.