Oh...I remember one a co-worker did. Drilling up from a first floor mech. closet into a second floor bedroom wall. Long 1" auger. Drilled until no more bit left. Still had not "broken through" anything. I went upstairs and his bit was riding the center of the baseboard. It left a perfect auger bit profile in it. Customer not home, and mess up was behind night stand. So we put it all back together for the night. The next day, I took some filler and sanding blocks, found some paint in the garage, and fixed it up like new. No one needs to know some of the stuff that goes on. :)