Yeah, not a very good backdrop. A spot with a nice size hill or mountainside makes a good back stop. Stray rounds can go just about anywhere, and you never know if there are others around that may be endangered by the strays. You should've posted a video showing the 12g throw you on the ground. That stance doesn't look very promising... and i bet your shoulder was prety sore. I got five slugs, but don't intend on using them until i get a rifled barrel in my 12g. Looks like you had fun though, just remember that safety is number one when shooting real firearms... not just yours but the safety of others.