Quote Originally Posted by Mikey View Post
My point exactly. Couldn't have been "free flowing", or it would have moved when the screw hit it. Probably was hit close to a fastened point, so the cable wasn't truly free. I've experimented a little with screw guns and nail guns going through 1/2" sheetrock into a stud cavity where cables were run -- never been able to pierce "free flowing" 14-2 or 12-2 cables with a screw, but nails are a problem due to their high velocity. Some of the heavier cables (e.g., 8-3) have enough mass that a nail will almost always pierce them before they've had time to move out of the way.
I said it was free flowing only by watching the video, but I agree with you, seems like it would be 1 in a million for that screw to go through unless it was fastened in place...