Rj111: "These incidents always look sweet and innocent until something bad happens - then they look barbaric."
Yes, and that's because they are truly barbaric.
In that case, the kid sitting in left seat had his hands on the yoke and applied pressure counter to the turn his father had initiated with the knob. As a result, the autopilot disconnected, undiscovered by the brilliant professionals in that cockpit until it was too late. A lot of lives were lost due to the unalloyed stupidity and irresponsibility of that pilot.