If you haven't done this yet, you might -- I did it for the second time today, but this time I paid attention to what happened.
First day I had my Gemini, I caught the skin on the inside of my right index finger right at the second joint as I closed the Gemini. It was bad enough to make it bleed like crazy.
Today I did it again, only this time I observed what happened (right after it did happen, obviously). If you hold your Gemini a certain way as you close it, your skin gets caught between the hinge panel and the little raised area right next to it. The edge of the hinge, it turns out, is really, really sharp -- may the lens on the camera module, whenever it ships, be as sharp. And it is in just the right place to catch that part of your finger as you close it.
And that part of your finger is well equipped with nerve endings, so you'll have numerous opportunities later to remember the injury.
Beware!