FCMA: Superhero Mail Art

I saw the Batman series of stamps today while waiting at the P.O. So how about some superhero mail art? Decorate your envelope with one or all of your favorite superheros. Make the envelope as bright as the inks in a real comic book. Feel free to add some POWERFUL words like "BAM" or AAAAAGGGGHHHH!"

Have fun and include a small flat item inside - a postcard, a take out menu, some stuff to make more mail art.

Try to use a superhero stamp too! (Not a requirement but it would be the cherry on top!)