Try with a slightly-stuck Opinell. You're more likely to throw the knive or cut/puncture your finger than you are to flick it open. You can push it open with th

Try with a slightly-stuck Opinell. You're more likely to throw the knive or cut/puncture your finger than you are to flick it open. You can push it open with the thumb while retaining the handle with the ring? finger, but that's not flicking.