I'm not sure if
JoergSprave made the weapon or the video in the OP, but he makes some pretty danged awesome weapons that work on "rubber power." I know he's made some Gattling gun-type of "slingshots," but a quick look at his videos didn't show that particular one. He has made tens of thousands of videos and "slingshots" though, so it might be in there somewhere.
Dude is funny as all get-out (to me anyway). One of his more "important" contributions to the human race was his "Candies For The Butt" slingshot, a cross between a Medieval torture device and modern-day medical device for "injecting" suppositories for whatever reason one might need to inject them. This video would be safe for work or most other environments I would think. The strongest language is the word "ass," and that even gets by the auto-censor on this site. His laugh is kinda evil-sounding though, so you may want to turn down the volume or put on some buds.
If you watched that all the way through you saw reference to a group in Austria who, after some expressed trepidation, accepted Joerg's challenge to test the device on humans. That video would likely not be safe for most work environments, so just
click on this and enjoy (if you like "Jackass" types of stunts, that is).
You're welcome! LOL
Blues