I saw a youtube reviewer open a Caribbean with his ring finger while the knife was facing outward, as if offering it to someone. I thought that was pretty neat, so, not having a Caribbean, I tried it with my PM2. Totally doable! Once you get it down it's very satisfying and, since the finger that deploys the knife is under the handle and out of view, it's a little bit like magic.
Disclaimer: this isn't a functional way to open the knife and you could easily drop it while practicing it. It's 100% presentation. But it basically goes like this.
Start by holding the handle outward, loosely resting the knife on your fingers.
Then move the pad of your ring finger into the hole and pinch the knife firmly between your thumb (just below the clip), index finger (on the opposing scale), and ring finger (in the hole). Those are your three points of contact -- I actually find it easier to do with my pinkie and middle finger off of the knife so they don't get in the way.
Now, the fun part! Sharply bring your index finger down towards you while really pinching hard with your thumb and index. This quick motion snaps the blade out and locks it into place. It should feel just like a flick, except the ring finger moves inward instead of outward.
You'll be left holding the knife outward, ready to hand to friend or foe. (Or you might be pulling it out of the carpet, or your thigh, or your girlfriend's thigh...)