While we have some airbus people on here, please excuse a bit of thread drift, but....in the event of a suicidal pilot deciding to dive the thing into the ground, what can the other pilot do? I know there is a little button which says "I have control", but then the other guy simply pushes his button again. You can't even break his arm, since it's on the opposite side of his body. Just asking, I was a Boeing (among others) man.