Years ago I had a traditional get together on my farm. I had a 3d course, a 100 field shot at a standard 4'x4' target face w/a 9" Bulls eye , speed round shooting, shooting from horse back Of,etc. all these events shooting at helium filled balloons was the most fun. In a cut 20acre hayfield, with tank of helium (rented) we released them down wind from the shooters. Balloons released 10-15yds out front of shooters in 10-15mph down wind. Simulated a slow flushing pheasant flying downwind. Often you could get off a second long shot at one. It was about as much fun as you can have w/ your clothes on.