How to describe my “pistachios accident”?

Question

I don't know how to express this minor accident of mine precisely and concisely, and also sound natural in English.

I was enjoying my "Dry Roasted Pistachios", given to me as a New Year present, and one of its nutshell(?) slipped into a part of my left thumb just under the nail. It slipped hard enough so part of it was shoved into my nail about one millimeter. My thumb was bleeding a little, and it is now a little sore. Luckily, not much harm done. :-)

Then I realized that I couldn't describe what happened precisely and concisely in English, even though I could describe it very concisely in my first language (within just about 6 words). How can I describe this in English? The expression should include these followings:

• the part of that pistachio (nutshell?)
• the slipping or shoving action
• (optional) the fact that the shell went in about one millimeter deep
• the part of my thumb just under the nail (nail nook? nail cranny?)
• I was bleeding

Thank you.

Answer 1

I'd just say:

I was bleeding after the pistachio shell went under my nail.

I'd also be rather tempted to name the incident for future reference. I'd suggest one of the following:

The Pistachio Incident of 2014
The Pistachio-tastrophe

Or, as @J.R. suggested, just shorten the last suggestion to the portmanteau:

The Pistastrophe

Answer 2

I realize this question has long since been answered by "The Great Pistachtrophe of 2014," but I'm intrigued by the puzzle of finding a succinct way to describe it in English. This is more than six words, but:

A pistachio shell jammed itself under my thumbnail, just deep enough to make me bleed.

1) the part of that pistachio: "A pistachio shell"

2) the slipping or shoving action: "jammed itself"

3) (optional) the fact that the shell went in about one millimeter deep, & 4) the part of my thumb just under the nail (nail nook? nail cranny?): "under my thumbnail, just deep enough"

There's no good word in common use for the specific part of your thumbnail that was injured (anatomically it's the "hyponychium," and only a few people might recognize it as the "quick"). However, the quick/hyponycium is implied by the fact that you bled, but did not need serious medical attention.

5) I was bleeding: "to make me bleed."

(Now I want to study Damkerng T.'s language, at least for long enough to figure how out to say this in only six words.)