Oh, man! A few people at my dojo have put holes in walls and mirrors with bo staffs, pads, and, I'm assuming, their limbs. I, myself, have not done this, but it's funny that I'm seeing this here since, today, I kicked a wooden chair out of anger here at home and splintered it... I'm going to tell my mother that I was practicing kata and got too close to the chair... *sweat sweat*