On the roof again

He can get on the roof in about 20 seconds now via the tree in our front yard.  And, he will if you take your attention off of him at all.  Today we were both watching him, but the neighbor across the street came out and said something to us.  John saw his opportunity and was up there before we even knew what happened.  Yoshie somehow climbed the fence and got up there almost as fast.  I ran out back to get the ladder.  But, John was already sitting on the gutter on the side of the house ready to jump off.  I tried to stop him but was unsuccessful.  I tried to break his fall but didn't do a great job.  He got hung up on the gutter messing it up and bruising his arm in a couple of places.  Of course he thought it was all great fun.