I struck out with two men on base. I was so angry, so frustrated, I turned and without even thinking about it, snapped my bat over my thigh. The bat split right in half. Afterward, reporters asked me if it was the first time I'd ever broken a bat over my thigh. "I broke an aluminum bat over my knee in college," I said. (I was just kidding).
Bo Jackson, Dick Schaap (1990). “Bo knows Bo: the autobiography of a ballplayer”, Doubleday Books