This is a personal underground shooting range i built for my slingshots. It is located under my house and took a few weeks to complete. (excavating, digging dirt, removing rocks, moving junk, etc...) It is 7.5-8m in length, and is perfect for slingshot target practice. The balls are caught in a sheet once they have bounced off the baking tray target. Please tell me what you think and what improvements i should make. http://www.youtube.com/watch?v=Wg3HHO4LPrI&feature=youtu.be Thanks For Watching!