Dude exact same thing happened to me in 1st! Was it the upper left thigh?

Hand, I (for whatever reason) was resting my arm on her desk (she was sitting behind me) while talking to a friend, and she was playing that game where you stab a fork in between your fingers (forgive the fact that I don't know the exact name) but using a pencil and my hand, so suddenly feel a brief pain in my hand and I turn around and she's holding the pencil and apologizing, got lucky and she missed my vains