The problem with it right now is the firing pin. It's still a bit too snug. That's why it flew up in the air like that. Because of the force I had to use pulled it off the chair. I'm planning on building a stake on the bottom so it can be driven into the ground or some other easy method to attach it to a wall/door/tree. I figure one reusable trip mine might cost in the range of about $6-$7. The idea in the end is to allow it to be used on ANY surface.
My next step is to get a good firing system in place. I'm ultimately like to create on that can be set up to remote detonate. We'll see!