Here's one, I was doing a bathroom remodel with my bro-in laws, one a GC, the other a plumbing contractor. they were on the job before me, starting to put in the jacuzzi, with the box cut open and laying on the floor of the bathroom or so I thought. As I walked on the cut open box my whole leg went thru the box and the dining room ceiling. There was the homeowners little daughter, sitting at the table eating breakfast, when she saw my leg come thru the ceiling she started to cry and got up and ran! That was horrible, but it's funny now!
