Pepper spray ring — Boing Boing Gadgets

 Gimages Goldring
When I was in Aspen a few years ago, an antiques dealer there showed me a handsome gentleman's ring that was also a single-shot gun. The dealer swore it was custom made for the mob. If I had a few grand, I would have bought the curious contraption right then. Less deadly is the "Stunning Ring" that Joel posts about on our new BB Gadgets blog. Hitting the hidden trigger produces a nice little blast of pepper spray. Link, Discuss at BB Gadgets