Home theater tip for your popcorn:

There's a product called "Flavacol" that's been around since the 50s (as you might imagine with a name and packaging like it has) which is a super finely ground salt, like confectioner's sugar almost, that has an artificial buttery flavor.

Add it to your popcorn before popping at a 1tsp to 1cup ratio, and be sure to pop with coconut oil, and you'll get that old-school movie popcorn flavor from back in the day.

For bonus points, use a whirlypop to get the same stir-bar mechanism theater poppers do, just hand cranked.