When a person hurts themselves by touching the string tree of a Gibson guitar the wrong way, most times on accident. It results from the bit of strings sticking out from the trees which can puncture the skin—almost like a needle due to how sharp and stiff it is.
Usually will result in a bit of bleeding or potentially tetanus if the strings are rusty.
Person 1: Ouch, something on the Les Paul headstock just jabbed my finger and now I’m bleeding!
Person 2: Must’ve been the Gibson sting.