1001 uses for a ground red pepper

http://ronin-kakuhito.livejournal.com/275223.html
So popcorn shows the same improvement and decline curve as chex mix with the addition of red pepper flakes. Of course, adding those red pepper flakes to popcorn is much harder. (What you really want with popcorn is for the oil to be infused with the pepper, not the flakes on the popcorn itself.)