Yup. Popcorn is a whole grain.
So I'm making popcorn trail mix today (just google "popcorn trail mix" and you'll get tons of hits).
But please, for the love of real food, do not make this:
and pretend that you're eating something healthy. If you must microwave your popcorn, google "microwave popcorn in a paper bag" for instructions on how to pop real popcorn in your microwave.