In a food processor, combine the chile powder, cayenne, if using, the parsley, brown sugar, bacon and salt. Buzz them until they are powdered. Toss in the garlic powder and mix to combine.
Put the prepared popcorn into a large bowl and drizzle with the melted butter, tossing to coat. Add the spice mixture and toss again, then serve.
It's like one thousand angels saying "Hello!" to your taste buds.