Thanks for the suggestions. I hadn't even thought that it could be used for something useful. Would feel pretty Macguiver (I don't think that is even how you spell it?) rescuing someone with a bit of cord attached to a carrot. Also, could be good to keep the drop bears at bay!
Also, I was amazed to see a forum dedicated entirely to slingshots! I guess that is what most people say about BPL though "only for light weight hiking!"