Mr 7 got out a step ladder and began cutting. He completely looked like he knew what he was doing. I guess he had watched me and his older sisters cutting hair dozens of times and he had all the actions down pat. Of course, what he didn't have was the stamina to endure to the end of the haircut. (Generally he doesn't even have the stamina to sit through his own haircut!)
So Mr 19 went on with the haircut and got a sister to help him finish off. That's what happens when the 7 year old cuts hair. It's fun for a while and then you get to finish it off yourself!