Hammer to Thumb

Today, I smashed my ThumbToday, I knelt on a roof, Fighting Tooth and Nail, I mean Hammer and Thumb10 feet above the ground at a pitch of 9/12Nailing down shinglesErecting a monolithDrudging through the day then my Thumb got in the way20oz of stiletto steeldriven downward by my own left handbetraying my right handNailing flesh