Guilty as charged. Not only have I fallen through a sheetrock ceiling from working in the attic above, I actually did it twice! Fortuneatly, it was not on the same job.
I'm also guilty of drilling through a "new" hardwood floor one time while drilling holes for some hi-hats I was installing. I never told anyone that I did it, but the homeowner did find it a few weeks later. I denied doing it, but felt bad later on having to lie about it.
