As a non pilot, AF447 crashed because the guy flying it kept pitching up during the entire duration of the stall, 30k feet. The captain finally realised what was going on just a few thousands feet off the ground and starts yelling the pilot flying to pitch down, and he has to repeat the command several times because the guy just isn't listening. Honestly it's just sad. 200 people killed because of an idiot. The same captain says "angle of attack 10 degrees" just a second before impact. The same pilot flying suggests to deploy airbreaks because he felt like the plane was going too slowly - during a stall. I mean it hurts to even think about this.