That foreman definitely saved his whole team a lot of headaches. I had a similar thing happen on a job where I was running conduit and an old timer just gave me a look and pointed at a joist I was about to drill through. Turns out there was a gas line running right above it that I completely missed in the prints. He didn't even have to say a word, just that look was enough to make me stop and check. I would have been in a world of trouble if I'd gone through that joist, probably a gas leak and a huge mess to fix. It's wild how much you can learn from just watching someone who's been doing it for twenty years. Never hurts to have that second set of eyes looking out for you.

Oh, I love that. I remember reading somewhere that kids naturally ask some of the most profound questions about the world before we teach them to stop doing it. That little drawing sounds like a real treasure.