Same here, I consider myself lucky I didn't cut my leg. If that hit my leg I'd definitley need some stitches.I learned this lesson the day I accidentally cut into a brand new custom made heat exchanger with a sawzall. The cut was shallow enough and in a location that the day was still saved but that was probably a $2k part with a month-long wait time and another thousand bucks and a day with a crane to get another one up there. So I just consider myself lucky and gotten away with a lesson learned.