No, Jude did not manage to cut his hair off to his scalp by himself. He let his brother do it. Here is another view:
Just as I placed Rory in the bath this evening, I heard Finnan and Jude run down the hall giggling. Looking back, the giggles sound devious, but in the moment, who knows? So, I let it go and continued to bathe Rory. Still, Rory's bath was cut short because Atticus had sent some guys over to remove our old (broken) washing machine. As I showed the guys to the laundry room, I heard more incriminating sounds...little voices trying to whisper "Hide! Hide!" When I heard this, I actually breathed a sigh of relief. They love to play hide and seek and I thought they were just hiding from me. Unfortunately, when I "found" Finnan he had kid scissors in hand and said, "Don't look at Jude." Before Jude emerged from behind the door, I saw the evidence on the floor. Inches of Jude's hair. Inches that I was so happy to have back after I experimented with buzz cut for Jude earlier in the summer. (For the record, I deemed that experiment a failure.)
To best mask the chunks removed, we had to buzz Jude's hair with a #2 guard. Jude seemed to enjoy every part of the process. He liked the haircut Finnan gave him and liked the subsequent haircut. Finnan was sent to his room and then straight to bed after dinner. I guess this is funny. I imagine it will be funnier when I get used to Jude's new do.