I never thought about slingshots before discovering his videos. I'm not a slingshot enthusiast, but I do deeply admire the work, engineering, creativity and craftsmanship he puts into his devices. So he's enabled me to think a little differently, and that's always good. I'm on a diet and so I've been freezing grapes as a snack. They obviously get extremely hard, or at least make a scary sound when you bang them against the counter. I was wondering how dangerous could they be? Shot from a slingshot, it could easily break glass, but how much damage could we do to ballistic gelatin? What would it do to a zombie skull? I'm just curious if anyone has tried this. It gives new meaning to grapeshot though.