Another time, the same guy, was part of a group of friends that were putting a new roof on one of their homes. They scheduled it on a WE when the guys wife was supposed to be away. Well, the homeowner goes to the store to get supplies, and the wife unexpectedly comes home early. She demands "what is going on here". At first, my friend tries to calm her down and says "don't worry, we know what we are doing". She responds "are you sure?"
So he tells her "Don't worry, they had an article in Popular Mechanics this month on how to take a roof off of a house, so we know how to do it, and next month they are going to have an article on how to put a new roof on a house, so then we will know how to do that".
She walked away crying and screaming!