I made him go kayaking with me.
He was reluctant at first...
We went to the next takeout, and decided to go some more... and some more.
Nine and a half miles in all, and we paddled the whole time (about three hours). It was exactly what we both needed.
He left with a new gi and a promise to give karate another chance - to help with some changes he wants to make. We had pizza and fun with the ninjas, and Middle brought home two buddies to sleep over. Savageman, the Teen, and I watched a movie together.
Sanity (at least temporarily) restored.