08/06/08 23:51:19
>>21
これは、cracking joints のようだけど……。
URLﾘﾝｸ(en.wikipedia.org)
＞ Cracking joints is the practice of manipulating one's joints such that they produce
＞ a sharp sound, likened to cracking (also likened to popping, etc.). The most common
＞ form of this occurs during knuckle cracking, a process different from snapping
＞ one's fingers. It is possible to crack other joints, such as vertebrae.[1]