Still life, with an M-16

The other night I dreamed I was at the park, at this large open field surrounded by tall trees. It was a sunny Spring morning and I was utterly alone.
I had an M-16 rifle with me, god knows why, and I was practicing shooting at this range of trees closing in around the grassy heath in the distance. "Y´know, this is so cool," I´d say upon every round I´d fire.

When I woke up, I logged online and started looking up old mid-1980s Vigilante comics for sale.